My freind wants to sell his xbox with 1 rrod. Is this an easy fix? he said he hasnt done anything to it. idk what error code it is. Ill ask him tommorow. Also what are the chances that its a simple fix? it only cost 30 bucks for xbox as is so it couldnt be that bad to give it a try.

The solution varies, often heatgunning will be necessary.
When you got the error code use my repair guide to get instructions on how to fix it and what is the issue.
Here is the link http://xbox-experts.com/e/repairguide.php