ResellOne is an ICANN accredited registrar with competitive prices and product range. Their web pages can be reached from http://www.resellone.net/ . They are related with Everyones Internet Ltd. http://www.ev1servers.net/ . They also provide very cheap SSL certificates(probably the cheapest) and other value added services. Recently ev1servers merged with theplanet I think. 

They have a quite responsive support staff and online chat which makes their support service exceptionally good.

ResellOne is an ICANN accredited registrar with competitive prices and product range. Their web pages can be reached from http://www.resellone.net/ . They are related with Everyones Internet Ltd. http://www.ev1servers.net/ . They also provide very cheap SSL certificates(probably the cheapest) and other value added services.

They have a quite responsive support staff and online chat which makes their support service exceptionally good.

 Advantages:

• Very cheap prices http://www.resellone.net/prices.aspx
  No startup fees associated if deposited $1000 or more at first transaction. Otherwise $99 setup fee is taken. All domain registrations cost $6.49 regardless of the amount deposited. It is possible to buy site SSL certificates for as low as $10.
  
• Value added services
  Managed DNS http://www.resellone.net/products/dns.aspx
  Site Builder http://www.resellone.net/products/wsb.aspx
  SSL http://www.resellone.net/products/ssl.aspx
• Dependable API (Same with Tucows/OpenSRS)
• Provides a user forum where one can discuss their problems with other ResellOne users http://forums.resellone.net/ .
  

Disadvantages:

• Relatively new to domain registration business
• Only .com/.net/.org/.biz/.us/.info registrations
• Although their support is trying to help. They dont have any technical knowledge of the system.
  
  

ResellOne is in a way an extension of Tucows/OpenSRS they use the same management system and the same API. Thus one can use ResellOne API with any program which supports the proven OpenSRS API. In a way ResellOne is OpenSRS Junior. I believe EV1 provides the infrastructure and OpenSRS provides the software.

Resellone Domain registration prices are very low. There might be companies selling domains with lower prices but I cant believe any of them are usuable for a serious hosting company. ResellOne is an excellent ICANN accredited domain registrar but not perfect. They do not offer a wide variety of TLDs to choose from. But if you are mostly registering .com/.net/.org/.biz/.us/.info then this shouldnt be a problem at all.