cost for 3.2 piston/cylinder set

I found a set of 3.2 Mahle pistons/cylinders for $1950. The supplier said these were US not Euro. Is that a reasonable price?

That depends, are you looking for the 98mm pistons to turn a 3 liter into a 3.2, if so there is no US version. If you are looking for pistons to refresh a tired long stroke 3.2(the standard US 84-89 kind), then that is a reasonable price. If you are looking for increased performance then the euro piston set with higher compression, or the 98 mm with higher compression for 3.4 liters is the way to go. I have seen the 98s advertised in the $2200-2300 range