I decided to sell my iMac to Mac of All Trades through macmeanoffer.com The iMac is 2007 2.8 core 2 extreme 24 inch model. Today I received an email from them saying that they received it, but that it has a yellow tint: "We tested the equipment you shipped - thank you. This is what our techs found: The iMac tested with a yellowish tint on the display. Please see attached photos for your review (one comparison, one of the machine itself)." They then continued to offer me a price $120 less then the initial quote. I never noticed a yellow tint on the display its whole life. It was always a bright and vibrant screen, and looked beautiful as I was erasing and restoring it. The screen still had better color them my new TV. Is it possible that the screen is not defective? In the comparison photos the iMac the tested against looks like it has a blue tint and mine looks normal. Does any one have experience with similar display issues or knowledge of the displays used at the time used in iMacs? I asked them to confirm for me that the comparison iMac was the same model. I also asked them to check that the had the same version of OS X. Maybe a different screen manufacturer? Multiple screen suppliers? Normally I wouldn't make this such an issue, but I have been having financial difficulties since my father passed, and $120 makes a very huge difference to me. Thank you to anyone who can help out.