Hate to break it to ya but they do have a point. Here's a couple references ...
Cars For Sale: Car Details - AutoTrader.com
Cars For Sale: Car Details - AutoTrader.com
I could have also included those that were a little further than 25 miles from my residence and those that had a little higher mileage but where years newer than yours. The fact is, you can pick one of these up, rebuild the motor and drop in a newer T56 for less than what you'd pay for yours and have practically zero miles on the power train. No offense or anything but zero miles to most people would surpass a few mods.