Under $40 (all i have at the moment, sorry)
Used (or new)
A set of street/trials isis cranks around 125-140
Or a 137 right moment crank arm
I also have some JC and Snafu pedals if your intrestead for a partial trade.
Ventures, Moments, Qu-Ax, Koxx, ect
Biggest set I have jumped is an 8; so it needs to be strong enough for that.