Hey-
I’m pretty sure that frame is an early Dagger, before they started using the Amp Research rear triangle. It looks like their downhill model with all the gussets and bracing.
Here is a link to RetroBike UK, it has a good write up with pics of a late 90’s Dagger with the Amp rear triangle… the frame (Easton Elite front, square tubing on the stays, Yeti/Ringle cable guides) similarities are still there, just a different pivot point and design.
http://www.retrobike.co.uk/forum/viewtopic.php?t=102176
Still a very doable price at $50.00, I would try to retrofit a used Amp rear triangle because the repair is hideous and I’d never trust that amateur job!!!