The VOIDRUNNER'S CODEX is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
There's no hard and fast guidelines for such a thing. I believe the "going rate" is probably around 25K for an "intro" feat (as in, one with no other feats as prereqs).