£100 is a reasonable amount for a second hand frame, especially if you keep you eyes open for something a little less searched for.
My KHS alite team was acquired for less than your budget, and is a truely excellent modern hard tail. With bugger all weight to it.
[size=67]Where we're going we don't need roads!
Under cover operative of the YVMBAPFS cartel.
The Pace fleet:
16" RC100/ 21" RC100/ RC100 Trials prototype/ RC200 F5/ RC200 F8/ RC250 Trials/ RC300 Gunmetal/ RC300 Silver/ RC500 F1 DH