I actually think this is more an attempt to exploit Trump's worldview; he's well-known to view inter-state relationships as purely transactional, and from that lens it seems like a good deal.

Thing is, depending on how the war goes either Russia or the US will take everything they possibly can from Ukraine; it may well be that offering Trump something the US was probably going to try to take anyway is just about the smartest way to turn somebody who was initially hostile to continued aid into someone personally invested in the outcome.