Would anyone have an Idea what the value of this Gravely tractor might be? It is a 12G Professional that was purchased in 1990. It does not have an hour meter but it probably has less that 15 Hours on it. It has been in storage for 28 years, it runs and I have cut a little grass with it to insure its operating correctly. I know the purchase price in 1990 was around $6000.00 Anyway I thought I would get some guidance on value.