The first thing you want to look at, is if there are any dents around the concave doors on each side. Some people don't want to adjust the rock trap properly which results in stone intake. TR's don't like rocks....! For the rest: we have a TR87 and we love it! Plenty of capacity! clean sample, nothing over the back and a nice combine to operate: simple, but anything you need is there.
You will be surprised!
If you are able to buy a decent one, we will talk again next year after harvest.
(watch my photo album here on the CF)