Pretty much all vintage Thinkpads are worth something and given that it is a 486 you can easily get $20-80 for it on eBay. My 755CE cost me $40 shipped just two weeks ago.

I tried ebay a few times and its pretty useless. It takes forever for me to get the money.
And i doubt any one would bother to pay shipping for it.

It doesn't take much effort to sell a vintage thinkpad once you prove that it is working and in decent or better condition. It is when people are wanting over $100 for unpopular/uncommon model. Try offering it for sale on a community somewhere, as for shipping people are happy to pay if the machine is good. As for the one you have there might be a possible screen upgrade/swap to one that supports color but information is lacking.