I'd like to upgrade to the 20" Intel, what do you think is a decent price to sell? Specs: 17" iMac G5 1.9 Ghz iSight 1.5 GB RAM. Bought 1GB from Datamem just 2 weeks ago. This machine is in mint condition, in a non smoker enviroment and bought it in November 05. I'm located in Orlando, FL.