How much does it cost to fix YLOD(yellow light of death)? &how long will the PS3 last after its fixed?

First of all if you were thinking of sending it to Sony, don't. They send you a refurbished console, you do not get a brand new console. Sadly, it only comes with a 90 day warranty. On the 91st day, if your refurbished console breaks down, Sony wants another $150 to have it fixed. Save yourself time and headaches from going to some local shop or craigslist guy who will fix it for $20 and a heat gun. Send it to a reputable third party repair shop. I found Gophermods.com off the PlayStation forums, and they were awesome. They have a cult like following on the PlayStation forums, and everyone recommends them. You should check them out! They fix the yellow light for only $69.99, and offer a lifetime warranty and a six month warranty and money back guarantee. On their site they say they see an average of 7-8 months, but offer a lifetime warranty.