The posters justone and mrtoronado are both good sellers on here and offer proxies in the bst section.
i've been using seo-proxies.com for a while now, it's ok if you need a couple; but if you need lots of throw away proxies then it's not for you.
Code: YourPrivateProxy.com PacketFlip.com However, I suggest you purchase a C Block of IPs; this is what I have been using for the longest time and it works out great. If you do not know what a C Block is, please search Google.
Trupals here on BHW set mine up quick, and they have been working like a champ. As others have said, get your own and don't waste your time with the free ones (you won't be sorry).