For Sale: Bikes & Frames: Bates Volante, Peugeot, very large Dawes, Motobecane, Koga Miyata etc

Hi,
I'm interested in building up a bike from scratch and I'm just doing some research. I would be quite interested in buying one of the frames here but I don't want to waste money for having a lack of knowledge.
I was wondering if anyone could help me though.
I already have a single speed bike and I want to build up a geared bike for longer commutes. When buying the frame however, what do I need to look out for?

Are there differences in the frame for a single speed bike and a geared bike?

Any help would be great,
Thanks
John

you won't get any help here. your better of going to the FORUMS -MECHANICS thread of this site.