Dude, if it cost you £600 to build that up you got shafted.
501 Frame - £50 ebay
Respray £60 Armourtex
Brooks £35
For everything else the forum - total cost about £150
mine was even cheaper
Frame + cranks, BB, pedals, brakes etc - free
Wheels - free
Cost of parts from local bike shops to convert to SS - £9 + free
Seatpost + saddle - £5
So I'm at £14 so far which isn't bad
I've almost finished it, I'm going to do a picture tonight when I change the forks
mine was even cheaper
Frame + cranks, BB, pedals, brakes etc - free
Wheels - free
Cost of parts from local bike shops to convert to SS - £9 + free
Seatpost + saddle - £5
So I'm at £14 so far which isn't bad
I've almost finished it, I'm going to do a picture tonight when I change the forks