I dont know much about opensrs but someone told me you dont have to pay a transfer fee if you sell your domain. Can someone post a low cost openSRS registration site if you know any?

You don't have to pay a fee.

http://www.bottomdollardomains.com (member here)
http://www.weblaunching.net
http://www.000domains.com

Ownership/Admin/tech and billing changes to names with OpenSRS can all be handled via manage.opensrs.net at no cost

Check that you're registrar sets your email address as the admin contact and that you have access to your own profile to make your own changes.

Transfers between OpenSRS resellers is charged for in the same way that transfers between registrars are handled. Shame as it used to be free and most other registrars will carry out these 'internal' moves at no cost.