Im not sure if pricing is that big of a deal anymore... I used to think so but look at mchost.com, there prices are $2 per GB..
Thats not exactly below retail is it??
So why do resellers flock to them,, because they are making enough money to provide the support they claim and stay in business.. what good is a reseller offering .50 per GB if they cant provide service(without this why not be your own hosting firm) and stay around(they fall under the resellers fall under)...
So i guess i would suggest not trying to sale yourself short, instead of asking what prices would be reasonable to the public i would ask what prices would i have to maintain to offer a valuable product.. then compare that to the market ex.
www.mchost.com, httpme.com, and see how it stacks up...
If you are close and can offer something unique, then go for it,, and good luck!