I'm pretty cheap and do most custom logo's for under $10, however being locked to that much isn't fair. Logo's come at all different prices depending on many factors. You will not get any serious logo designs to join because a serious logo designer can make 100's - 1000's more per month.

Lets say you are not a very nice person, you could easily get the designer to flog himself making heaps of logo's (this deal allows up to almost 300 logo's per month) and your selling them at $25 meaning, at maximum your getting $7,500 worth of stock per month and paying the designer $450 out of it... I mean... COME ON!