I have the 2 sets of 500 from Taschen on CD(which are the de espona) - I'd say most of the models need lots of texture work & in addition some need fixing up in a modeling program - funky polys etc etc.  I only paid 50.00 per 500 about 3 years back.

If you check at vanishingpoint.biz he has redone most of these with new textures & poserized some.  The CD"s I got came with a book w/pictures(as Forester has stated the pics represented in the book are WAY over exaggerated as to what they look like once imported into ANY 3d program)

Glad I only spent $100.00!

Edit: they did com in various formats usuable in any 3d app.