Talk to your local dealers.
I got REAL lucky a couple of years ago. I purchased a Fast Load for my 2000 Baja 272 and just plain did not like it. Only trailered with it one time, and it looked brand new.
Went to the local dealer that handles Myco and he had a buyer for my type and size trailer, gave me $300.00 less than I had paid for it, and ordered the new Myco at a good price.
The timing was right. Just check around with all your local dealers and tell them what you have to sell and maybe you will catch a break as I did.