The physical Gamestop locations are also horrifically overprovisioned to be an eBay storefront. Many companies have already experimented with things like "lockers" which seem to be successful enough to hang around, probably because the costs are low enough they don't need to do much to justify themselves and they don't need dedicated store fronts. If they want better assurance that the things being shipped are what the sellers claim they are a partnership with UPS or Fedex and their wide variety of existing storefronts that are already provisioned with everything you need to ship almost anything makes orders of magnitude more sense, and nobody has to "acquire" the other to make that work, without the square footage of a Gamestop location.