I've gotten a few replies with people interested in parting with E450s, 250s, 280s, and 220s (I have an Ultra 2 to throw onto the pile, for what its worth). So far, every reply has been, "It's yours if you pay to ship it."If any devs would find any of these useful, or know of a dev who would find them useful, please let me know. I'm happy to get this rolling--either by myself or with the help of others.
Count me in; I will help pay shipping as well.