Where To Buy Proxies in Bulk?

I've never done this before but I need about 500 proxies which are fast and anonymous.

Any idea where to bulk buy proxies and how much they would cost?

anonymous-proxies.net is my gem for private proxies. You can choose location as per your requirements.
There's a promo going on these days: http://www.blackhatworld.com/blackh...ion-24-7-support-post2714695.html#post2714695

Cheers.

You can also look at squidproxies, already has a selling thread on this forum with discount prices and you can get 10 private proxies for USD 18/= only, search this forum for squidproxies. Also yourprivateproxies is also a good provider