PTC typically has some aggressive sale on its software every month or so. This month it's...
Buy a year of Support, and we'll trade your old 3D CAD software for a full professional seat of CoCreate Modeling free!
Some of the terms:
-- Release 2002 or newer of any major 3D CAD competitor, with some extra conditions applying to Pro/E.
-- Can't have already taken another CoCreate promotional offer; offer ends 31 July.
-- Proof of purchase required, so no trading in bootlegs!
-- Get up to 10 seats in Europe, no limit elsewhere.
Um, there is a limit: "Seats distributed first come, first-served up to 1000 seats."
OTOH, that limit isn't a problem, because I can't see a thousand seats being traded in. These sorts of cross-grade offers tend to attract customers in the tens or hundreds.
(The Pesonal Edition is the free one, referred to in this item's title.)