proxy-compare.com

Types of proxies, and which one you need

Four kinds of proxy, and they are not interchangeable. The cheapest that survives your target site is the right one, start at the bottom and move up only when you get blocked.

Or not a proxy at all

A scraping API sells you the finished page rather than the address you fetch it from, and bills per request instead of per gigabyte. On heavy pages that is cheaper; on light ones it is not.