I am unsure how a Gamestop/eBay storefront would do. Physical manifestations of "eBay stores" have existed in the past and none of them did very well long term.
At least my shipping broker in Canada uses small retail stores as dropoff points and then has a network of gig courier delivery companies they send stuff to for last mile delivery. Saves a lot on shipping costs.
I’ve noticed they don’t really integrate with gig couriers for last mile US shipments, just a few consolidators for mid-mile (eg: UPS Mail Innovations that uses USPS for last mile)
Might further delay delivery times but I use eBay to save some dollars in exchange for delayed gratification.
Which means an eBay store would never make sense for my type of buyer or seller because I would just go to one of the many other existing entrenched retailers for regular things.
I know eBay pushes hard for regular retail but ultimately I see it as a marketplace for less fungible items and that’s what it excels at. Regular retail for regular items is easier because the user experience is always standard.
GameStop is trying to sit in the middle and trying to move product that is a little more fungible (previously used games and now more trading cards and collectibles) but I just don’t know how big of a market it is when you have to factor brick and mortar upkeep. I don’t want them to take down eBay in an experiment.
A key here I think is the easy gradual transition here because Gamestop already has the used games business they could slowly integrate that into listing used games on eBay that were received at stores and then add related categories step by step with collectables and consumer electronics. There'd also be options of ebay items delivered to store which increases store traffic and doesn't involve giving strangers on the internet your home address, and there might be opportunities there to enter logistics and lower delivery costs for people.
This is a market that is a fraction of the size of the game market, their pivot is into a smaller business?