GURPS Dungeon Fantasy Treasures 1: Glittering Prizes

[Kromm]

The upper limit on FP as currency in DF is $5, because that's what it costs to put 1 FP in your power item (DF 1, p. 28). The $1/point for Quick and Dirty enchantment (DF 1, p. 30) is lower, but that's discounted for "invested in this one item for one purpose." I'd call $5 the going rate for "goes anywhere, does anything" FP.