I have a women's wetsuit, full-length, size "small" (maybe US 6?) worn once in the 5-meter pool. I'd swap it for some reading material (novels, history, business, magazines, anything really).
I have two very nice woodwork manuals I bought for my husband on Amazon, but he never uses them. They have instructions for making furniture and refurbishing. Again, swap for reading material, or make an offer of something else.