A buddy and I buy, maintain, sell a few machines on the side each year. We do most of our business thru CL. I use a few other search engines to help me search CL like Tempest. The issue is market value doesn't always apply to CL. If you do a broad search (within a couple 100 miles of your location) you will likely find a few similar machines priced below market value. People get to a point where they need cash, or dont know the market (paid for the tractor 5-10-15 years ago and just want it gone) and put up a similar machine for a very low price. We have pulled ads and sat on tractors for a while till the low tractors disappear, only to turn around and sell for our original asking price.
The tractor sales business is a big risk and gamble, they are only worth what someone pays you not necessarily market value and that's a tough pill to swallow. Best of luck.
As stated don't just list it in your area, broaden out and list it in other local-ish locations. Just make sure to put in the body of the ad the city or zip the tractor is actually located in. This will avoid a lot of inquiries that just lead to "oh I'm not traveling that far."
If it's a fair enough deal I've had people show up from over 600 miles away with cash and a trailer.
Happy hunting, Rye.