iPhone Safari
- Open app.seromunich.com/app in Safari
- Tap the share icon at the bottom — the square with the arrow pointing up
- Choose “Add to Home Screen” from the list
- Tap “Add” in the top right
App Store · Available Soon
Scan it.
Check it.
Sell it on eBay.
SERO identifies your item from a photo, backs the market value with real sales, and hands you a ready-made eBay draft. Nothing goes live until you approve it.
How it works
Three steps.
The last one is yours.
-
Scan
One photo is enough, more is better. SERO reads set, number, edition and language — and on slabs, the grader, grade and cert number straight from the label, whether it's PSA, CGC or BGS.
-
Check
A title buyers actually search for, category, price suggestion, shipping, cleanly cut-out photos — everything is waiting as a draft. Anything that's off, you tap and change.
-
List
One tap and the draft goes to your eBay account. It only goes live after your approval — never on its own, never unasked.
What SERO prepares
Everything is ready
before you decide.
- Identity
- Set, number, edition, language — the details the value hangs on. On slabs that includes grader, grade and cert number: a PSA 10 is a different item than a PSA 9.
- Market value
- From real evidence: sold items and live listings matching edition, language and grade. When the evidence is thin, it honestly says “value unknown” — never a made-up number.
- eBay draft
- A title buyers actually type, the right category, every required field, shipping. Your own photo, cleanly cut out, is the main image — not a stock picture.
- Approval
- Nothing goes live on its own. The draft waits until you have checked and approved it.
Along the way, your collection builds itself, values included — an overview, not a chore.
Who it's for
Built for collectibles.
- Trading cardsPokémon, One Piece, Magic and more — raw and graded, PSA, CGC, BGS
- Retro gamesfrom NES carts to sealed PS2 classics, WATA-graded too
- Manga & comicsfirst editions, Japanese originals, graded books
- Everything elseSERO also recognizes electronics, toys and more — just give those drafts a closer look
The honest math
Listing one item.
By hand
~ 8 minutes
Identify the item, dig through sold listings, crop the photo, fill in the title and every required field.
With SERO
~ 1 minute
Take the photo, check the draft, approve. Counting the full minute — picking up and putting down included.
Home screen
Like an app,
without the App Store.
SERO runs in the browser. From your home screen it launches like an installed app — full screen, with its own icon.
Android Chrome
- Open app.seromunich.com/app in Chrome
- Tap the three-dot menu in the top right
- Choose “Install app” or “Add to Home screen”
- Confirm with “Install”
FAQ
Short answers.
Do I need an eBay account?
Yes, your own. SERO lists through your account — you connect it once, and SERO sets up your selling policies and shipping location along the way.
Does SERO publish on its own?
No. Every draft waits for your approval. Only your tap makes it live on eBay — there is no autopilot.
Where does the market value come from?
From real evidence: sold items and live listings matching edition, language and condition. When the evidence is thin, SERO shows “value unknown” and you set the price yourself. Honest beats invented.
Does it work with graded cards?
Yes. SERO reads grader, grade and cert number straight from the slab's label — PSA, CGC, BGS, WATA and more. The grade is part of the identity: what gets valued is the graded item, not the raw card.
Which categories does SERO cover?
SERO is most at home with trading cards, retro games, manga and comics. It also recognizes other items — electronics, toys, accessories — those drafts just deserve a closer look before you approve.
When is SERO coming to the App Store?
Soon. Until then, SERO runs as a web app in your browser and from your home screen — full feature set included. The guide above shows the way.
Ready for your
first item.
Start for free, scan your first item, see the draft. Nothing goes live without you.