It basically comes down to what they are worth to you. But, for something fairly well used I go for about half of new price. If something is basically like new and just gathering dust I would make it substantially less than new, but probably not half replacement cost. Seems to hold true for all the hobbies I enjoy. I don’t know those wheelsets specifically. But, new wheels are pretty affordable these days. Maybe throw in some other bike junk you have laying around to sweeten the deal to a potential buyer?
I’ve noticed that the difference between a really good deal and a normal internetz selling price can come down to 20 bucks or 40 bucks. If you want it gone, price them about 10-20% less than what similar items are going for. The buyer is usually quite happy they are getting a bargain and it will sell quickly. Usually when I go to selling online I price things competitively so it sells quickly with minimal hassle. Same thing when I’m buying, I’ll pay cash with little or no haggling if the price is fair. A smooth transaction makes everyone happy.