There wasn't much more I could of said about the wheels to be fair, and how many pictures do you take?
I do a ton of Ebay and I have to say your title is at least a reason for the disappointing results. Think about it this way: how is a buyer going to find my item? You wrote "Mavic 231 CD Rims" which means only people searching for that exact rim and those bored individuals who just happen to be browsing will find your item.
Ok so lets say YOU were looking for some sweet old wheels what would you type in to the search bar? (Mavic? maybe, Shimano? Yes, XT? yes) So here is how I would have written it:
NOS New Vintage 90s Mountain Wheel Set Mavic 231 CD Rims Shimano XT Hubs 8 spd
Note that I used every character Ebay allows and tried to think like a buyer who is looking for wheels. I guarantee that my title would generate many more hits. and hits sell parts.
I was old school before it was cool