I (hopefully) lucked out, one of the local guys wants to sell me 8 of his, as he is brewing on a larger scale with a few other guys on something like a 10bbl system (Thanks to the Reverend JC for the hint on the keg source!)
Even after that, though I still want at least 6, maybe 8 more kegs. Total of 16 is my goal.
I got some with a keg kit at Keg Connection, over all pretty good kegs, mechanically fine, clean where it matters and a few stickers on the outside, just the kegs is right under 30 bucks delivered. Picked up 2 from a guy on ebay with no phone and mis-spelled for 22 each delivered, one was firestone so slightly different top style and socket style, need a rebuild and the tops are a bit nasty, picked up a few at a home brew store in OKC for 35 bucks each that where spotless, not a sticker or anything, but of course there I was able to pick the best of the litter. The had some that were comparable to the Keg connection jobs.
Personally I do not really like scrubbing old moldy tops, and the keg connection ones are pretty much a fast just to sure wash, sanitize, check the seals and and your ready to go.
In the end it comes down to budget and value of time, for me brewing is fun, but the cleaning part sucks when for a few extra bucks I can get something that has been pre cleaned.
Since you're in PA, there was a guy on ebay selling kegs from Wilkes-Barre at a reasonable price (I don't remember his ID though), he was open to local pick up if you wanted to save on shipping and pick them up.
I live down here in norther chester county and i picked up 4 off of ebay from a guy in willamsport pa for 23 bucks a keg that is what it worked out to be with shipping. the shipping was the cheepest i saw. here is the listing http://search.ebay.com/_W0QQsassZmarkclaire
hope this helps
Insco selling here on HBT for $20.00 bucks a keg that are cleaned sanitized, purged of air and come with replacement O-rings and grommets. Quick, well reasonably priced packaged delivery. I'm just a very satisfied customer.