Getting your Xbox repaired for the RROD DOESN'T cost tons of money.
Call the Xbox Company, and give them the service number on the back of your Xbox.
They will send you a box to stuff your entire Xbox into, first put it back together, but take the hard drive off. (The storage device on top with the little sliver bar.) Mail it to the address it came from OR the address they gave you.
Once done, wait 5-6 days, and presto, you will have your Xbox all repaired, but you may get the 4 rings the first time you start it up due to fixes.
If you had markings or stickers, etc. on your Xbox, and they can't get it repaired, you'll notice it's fresh and clean. They gave you a new Xbox since you couldn't get yours fixed.