not speaking for everyone here, but if the price ends up being higher than ugc's then i think
a) superior quality would make it a non-problem, especially if it's obviously a better storage option, and
b) for international buyers it'd still be way better than getting ugc's from a reseller
either way; better make goddamn sure the cases are up to snuff and start off with something like nes/snes/n64 that's in bigger demand. and if there's any way to get a handful of semi-finalized samples to some trusted "consultants" in this community, they could try them out and stack them together and ensure you it's a top-notch product in comparison to what they're already using. if that was possible i'm sure it'd put everyone's minds at ease.