AP7960's can be had for pennies on the dollar on Ebay. If you have the physical infrastructure to support 'em (208v/3ph power runs to the rack), I cant imagine why you'd ever want to switch (unless of course you're buying new, and not watching Ebay for the constant stream of < $100 ones granted).
I would be really careful buying power strips on ebay. I would not want to take the risk with our power just to save a hundred bucks. Network can blip for a second and we are fine, but power cannot.
APC PDU's have one commonality. Either it arrives, and it works, or it doesn't. They're one of the items that are pretty solid in terms of consistent performance, and I've never had a flakey/lemon unit (with over 100 deployed having said this). You can throw 'em down a flight of stairs, and if the boot (read: depending on the height of the staircase), they'll be fine for 5+ more years .
Ya we have just had 2 units go bad on us (brand new).
Then we purchased a used unit on ebay a while ago (it came all beat up and we decided it wasnt worth putting in a rack and having it fail).
I've bought well over 100x 9211, 9226, 9217, 7900, 7901, 7902, and 7930 units gray market/ebay over the past 8 years (combined, notice the trend? all 120v). So far, only units that were DOA were ones described as DOA by sellers (to which I proclaimed "thats unpossible!"), and it turned out they actually were dead.
Many others were described dead, and just fine. Out of our current working production lot, we've had 1 suffer a critical/unrecoverable power failure, 2-3 have nvram issues (wiping username/pw settings), and the rest have been fine.
Take into account the size of the lot, the age of the models in question, and the running time, and thats a failure rate of < 0.5%/year, which I suspect is totally in line (relative to model age) with what you'd see brand new with APC