Need suggestions or reviews cheap proxy service

Hi there!
I need Geo-target backconnect proxies from Germany.
I searched and found some provider have cheap price like: proxy-cheap dot com, proxy dot cheap, proxygurus dot com. But they have less reviews and i can not connect to their support.
So please suggest or reviews on cheap proxy service above.
I use proxy for boosting website traffic, it takes about 400KB/session.
Sorry because of my bad English.

there should be 1/2 guys who can sort you out here
https://www.blackhatworld.com/forums/proxies-for-sale.112/