LeftyBassist.com

I've played this bass in the store, and can vouch it's in great shape and plays well. Disclaimer: I have no affiliation with the seller. heck, they see me coming and want to charge double LOL.

http://cgi.ebay.com/Musicman-Stingray-L ... dZViewItem

There is also one for sale in NYC. It's $1K though.

http://newyork.craigslist.org/mnh/msg/1113820619.html

No affiliation though. I have never played a Musicman bass, but I would love to try out a Sterling. I prefer small necks. More J-bass than P-bass.