Thanks for the tip. I did check the program rules, and didn't see anything that would prohibit it, though I guess maybe it would be assumed to contain flammable fuel (that's really not the case, it's dry as bone after the length of time it's been standing). In any case, now you've tipped me off I won't be taking the risk. I shall remove the global shipping from the listing.
Edit: And now because it already has a bid, I can't untick the GSP box. Well, if it's not showing up I guess it's not a problem. Perhaps that is automatic as I put it under the generators category.