Nearly 300,000 zlotys in turnover in a single month and a 90 per cent month-on-month increase in sales. How did Sferis boost sales on InPost Von Halski?
InPost Von Halsky
28 October 2026
Sferis.pl is an online shop with over 22 years’ experience, offering consumer electronics, household appliances, audio-visual equipment, as well as pet food and accessories. It was one of the first to join InPost Von Halskiego. Today, its sales are growing by an average of 90 per cent month-on-month, and in its best month, the shop processed over 1,700 transactions and generated a net turnover of nearly 300,000 zlotys. The secret? A carefully considered product range, seamless integration via Base and active participation in promotional campaigns.
A new channel, new customers
Sferis has been working with InPost for years across a range of areas, so when the invitation to join Von Halski came along, the decision was made quickly. The reasoning was simple: every sales channel brings a new group of customers, and there are 17 million users waiting in the InPost app.
“Every retailer is looking for new customers. We decided that Von Halski’s customers would be a very good customer base for us. We saw great potential in this project.”
Paulina Gołąbek, Marketplace Development Coordinator, Sferis
Products that have become bestsellers
Sferis did not upload its entire stock to the platform. The team first set out the parameters: which categories, from what price point, and which delivery options were on the cards. To begin with, bulky items were ruled out, amongst other things, and from the remainder, bestsellers and those product groups that sell most easily were selected. The range was deliberately kept smaller: first observation, then expansion.
The result of this approach can be seen today in the seller’s dashboard: there are over 21,000 active Sferis listings on Von Halski.
Znajdź najlepsze oferty w kilka sekund z Von Halskim - asystentem zakupowym w apce InPost Mobile. Odkryj produkty dopasowane do Twoich potrzeb i oszczędzaj na dostawie.
Von Halsky węszy okazje. A Ty? Wiesz już, czego szukasz?
Integration via Base
The listing appeared on Von Halski thanks to integration by Base. Sferis appreciated the fact that the products were immediately placed in the correct categories.
“The onboarding process went smoothly and intuitively – the implementation and the start of our collaboration were quick and well-organised. When uploading products, you immediately categorised them into the correct categories. Very often on other marketplaces, products end up in the wrong category and it creates a huge mess. That wasn’t the case with you.”
Paulina Gołąbek, Marketplace Development Coordinator, Sferis
A surprise: electronics on offer, but pet food in the trolleys
From the outset, Sferis had focused primarily on electronics; yet in the first few months, pet food accounted for as much as 80 per cent of its monthly sales.
“Customers come back for the food. Once they’ve ordered it, the app automatically suggests that product to them on subsequent purchases – specifying which retailer sells it and at what price.”
Paulina Gołąbek, Marketplace Development Coordinator, Sferis
This observation has changed the way we work with the product range. Sferis analyses what customers actually add to their trolleys and ensures that the price and positioning are such that the product appears amongst the assistant’s top suggestions. Knowledge of the average basket value is also helpful: 80 per cent of orders fall within the 60–250 zł range.
Promotional offers designed to clear stock
The strongest boost came from promotional campaigns run in partnership with Von Halski, including a radio campaign featuring a Samsung tablet, a campaign featuring a Lenovo laptop, and a promotion featuring a set of Tefal frying pans. It was this last product that proved to be a hit.
Sferis offered an attractive price, and the product was included in a joint promotional campaign with Von Halski. Orders started coming in from the morning, and there were around 300 of them in the space of a single day. Some of the stock was already in the warehouse; the rest arrived in the afternoon, and the team immediately processed the delivery, allocated the products to the orders and dispatched them. The late cut-off times for posting parcels at InPost helped with this. Importantly, the impact of the campaign isn’t limited to a single product. Customers who visit the shop for the promotional items also check what else the retailer has on offer.
“A single promotion encourages customers to see what else we have on offer. This drives our entire turnover, which is why it’s worth fighting for every customer.”
Paulina Gołąbek, Marketplace Development Coordinator, Sferis
Results: 90 per cent month-on-month growth
Sferis’s sales curve for Von Halski is clearly on the rise. Sales grew by an average of 90 per cent month-on-month in July, August and September, with August – the month of promotional campaigns – proving to be the strongest:
- Over 1,700 transactions in a single month.
- Nearly 300,000 zlotys net turnover.
What sets Von Halski apart? Trust and no commission
When asked about the platform’s greatest advantage, Paulina Gołąbek does not point solely to technology, but to trust: customers know that Von Halski is backed by the InPost logistics network. The second distinguishing feature is the zero commission, which for sellers means not only savings but also the freedom to offer customers the best price.
“Thanks to your zero commission, your prices are the best on the market today.”
Paulina Gołąbek, Marketplace Development Coordinator, Sferis
Three tips from Sferis
Do you want to boost sales on Von Halski? Here’s what you should do:
- Start by sorting through the items, not the whole warehouse. Choose categories and products that sell well and are easy to dispatch, and expand your range as you see what works.
- Keep an eye on what goes into your basket. On Von Halski, a different category to the one you’re betting on might win. Products bought regularly gain an advantage because the assistant suggests them during subsequent purchases.
- Take part in promotional campaigns and be prepared for them. A good price with no commission and visibility within the app is a combination that can clear your stock. Make sure you have enough stock and that your dispatch process runs smoothly, as orders can come flooding in within a matter of hours.
This is just the beginning
Sferis is facing the busiest sales period of the year. The shop is submitting further products to Von Halski, including LEGO sets, and is preparing for the fourth quarter.
“It’s definitely worth joining Von Halski – it opens the door to new customers. It’s also worth trying out promotional campaigns, as they generate extra sales.”
Paulina Gołąbek, Marketplace Development Coordinator, Sferis
Would you like to find out what Von Halsky can offer your shop? To get you started, you’ll enjoy 0% commission, access to 17 million InPost app users, and integration via Base, another integration provider or an API. Start selling Available on InPost from Von Halsky today.
Join us
To activate the InPost Von Halsky integration, you need an active logistics agreement directly with InPost (either a commercial or subscription-based contract) covering two services:
- InPost Paczkomat® 24/7
- InPost Courier (Standard Courier)
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