DoomSooth: I'd buy DRM-free Diablo II and III.
DRM-FREE and offline D3 would be amazing.
As for D2 - there's ways around its retail disc DRM (especially if you got the older disc version), whether you have it from Retail or Blizzard's Website. Namely, see this over on PC Gaming Wiki -
https://www.pcgamingwiki.com/wiki/Diablo_II#Run_game_without_CD Still would love to see D2 and D3 Complete Editions hit GOG, of course.
Oh - also include D2R too; would love to see that hit GOG.
DoomSooth: If they're making a remastered version, there's no reason not to sell the original here. I'd still buy it.
Cadaver747: Like it was mentioned already original Diablo 2 along with Expansion is available on Battle.net
https://us.shop.battle.net/en-us/product/diablo-ii https://us.shop.battle.net/en-us/product/diablo-ii-lord-of-destruction D2 old versions are easy to run on old hardware & software...
...meanwhile D2R is not as easy since it's newer and all, not built around older hardware.
So, yes - always bring ALL versions to a store, IMHO; similar to how Blade Runner: Enhanced also has the old version with it here on GOG. More games should do that, IMHO.
Not everybody has 8gb VRAM RTX 3070's (or newer), 16-32+ GB RAM, modern CPU's like R5 5600H (laptop CPU), and/or modern PC's.
EDIT - Also, I'd love to see Deus Ex HR Old version on GOG here. Sure, new DC Remaster's good, but it ain't perfect and got some performance & stuttering issues...since for some reason they used an older unfixed build of HR to make HR DC with. The old-versions of DXHR just DON'T have these weird performance issues - so that version is easier to run and also more ideal for say running; especially for The Missing Link DLC.