I have a very general question about year models. A guy has two Craftsman lawn tractors for sale on Craigslist. I haven't talked with him, so don't have any identifying numbers. However, one of them is dark green and one is red. Can anyone give me your best guess about age based on the colors? Thanks in advance. By-the-way, my current rider is a 1990 model Central Park 8HP 32"cut. It still looks good and does OK, but I am looking for another mower.