Have you tried working some lube into the pushrod in the booster??

PS: I'm another one that gave up on E-bay.... I still browse the site, but if the seller doesn't have a phone number to a legitimate store that I can call and verify that they are a "real" business, and not some clown selling junk out of his back room, I don't do business with them. That and the fact that E-Bay and Pay Pal have gotten totally stupid on their fees!