I've got and XJ-740 we are considering parting with. Its 3 years old. Prints like when we first bought it. Printheads in the machine have been replaced about 1 1/2 yrs old at this point and firing well. Scan motor is a little noisy, but if we sold it I think we would credit for a replacement (about $800-$100 depending on the dealer)
We are just about to order a new printer and we we're planning on sitting on the XJ awhile to see if we actually want to sell it.