A list which may able to help u...

Note:
* Some registrars required a coupon code to have price cut, all coupon code will display in red color.

Mydomain.com
Price: As low as $5.95, depends how many you want to purchase.
Mydomain.com coupon code: htmli.info - 15% OFF of your entire order by using this coupon.
# Valid on all service provided by mydomain.com and all TLD / cctld domain registration, transfer and renewals.

Register.com
Price: Free! ( You must have a valid credit card )
# One credit card one domain ONLY. $35/year renewals fee

Netfirms.com
Price: $6.95 ( $9.99 renewals fees )
# One customer are eligible to get maximum 5 domains on $5.95, no push function is available.

Godaddy.com
Price: $8.15 ( .com )
Coupon code: CJCDEAL32

Domain.com
Price: $7.60
Coupon code: htmli.info
# Price valid on new registration, renewals, and transfer. Lower rate if you register in bulk.

Dynadot.com
Price: $2.99 (.info)
# Great if you plan to get a .info domain and they allow test domain too