Yeah, basically what Ghost said, not specific to M3 or V3, though I'd go one step further and add items that have a general appeal for those artists that don't only focus on pinups (and that is nothing against pinups at all). Things in a Sears catalog, props sets, creatures. Treasures of Egypt was a good example of a prop set that while I guess could be used for pinups, had other uses as well. Also, when the PC first started, they had lots of great critters like the dragons, eagles, etc. Basically things that can be used in a standalone way regardless of genre (or at least aimed toward a generic use in a particular genre).

In your recent sale, all I bought for the most part was those kinda generic items (the morphing skull, the food pack, the diner, to name a few) because in terms of playability I can get a lot out of them.