I ran across a Petter diesel genset at the Green Dragon flea / farmers market in Ephrata, PA last Friday. It's at the tool stand run by "Larry" in building 5. I didn't think to look for specific information on makers plates, etc, but it was small enough that it was probably a single cylinder engine. I recall from my reading in the past that Petters have a following, so I thought I'd mention it here in case anybody's interested. The sign said he was asking $600 (or best offer - I think) The Green Dragon is only open Fridays. Larry has a smaller tool stand at Roots on Tuesdays, but my guess is that the genset is heavy enough that it will stay at the Green Dragon rather than travelling.
RWL