Taken from http://www.stargate.com/Pages/stargateSRS.htm:
"Prior to activation and registering domains, the registration partner must establish a pre-paid bulk account with Stargate Communications, Inc. A bulk account of a minimum of 20 domains must be pre-purchased.
A one-time setup fee of $50.00 USD is required. Domains are currently offered to our registration partners at a cost of $8.00 USD per domain."
hi again, well i know enom is good... but are you really willing to pay more for features which perhaps are not even needed? Look at directi.com or onlinenic.com thei are lower than $7 and seem to be good, but I'm still not sure if they are the cheapest
The cheapest domain register I know is godaddy. Its $8.99 for a domain and there isn't a setup charge or anything. I know its good, because many of my friends got there domain there. I probably wouldn't go any lower to make sure I don't get ripped off.