If buying a frame... ask the seller to show you a photo with the fork and bottom bracket seprate, i say that because I recieved a frame with a seized quill stem and had to pay my lbs to have the damn thing cut out loosing a lovely cinelli! and i knew somebody who's frame had dodgy BB threads - its things like that you have to make top prio.

For stems / bars and other solid objects its number 1..check the ebay stores, i got brand new tiagra chainset for 1/2 high street price.