I think there's 2 ways to fix 3D All-Stars.
1. use the unedited ROMs, no widescreen/upscaled textures/e.t.c., - throw in 64 DS; 3D Land and Galaxy 2, maybe even Wario World and Donkey Kong 64 - and sell it for £30.
2. remake 64, Sunshine and Galaxy a la Crash N. Sane and sell it for £30.
1. use the unedited ROMs, no widescreen/upscaled textures/e.t.c., - throw in 64 DS; 3D Land and Galaxy 2, maybe even Wario World and Donkey Kong 64 - and sell it for £30.
2. remake 64, Sunshine and Galaxy a la Crash N. Sane and sell it for £30.
We have never seen these models in any kind of HD resolution, but I can tell they're pretty good for N64 standards by looking at them.