[MENTION=558625]HuffyMaster3000[/MENTION]
A good place to start might be the C&V Sales subForum.
There is also a For Trade thread - people trade things, sometimes $$ for goods.

I do what you are planning, but with vintage European road bikes (mostly). $150 is generally my upper limit for frame + fork in good condition, but not always.

Also, check out the prior 'clunker build competition' threads = $100 total investment for a bike you must also ride 100mi to prove its' road worthiness. A lot of good ideas.

These 2 I finished today with only bar wrap remaining.


These were more expensive frames, but given all the other expenses - the few extra buck make these a bit more memorable for me.