Personally I don’t think very much. One would have to looking particularly for them. i just changed mine last week for BFG Trail Terrain T/A @ 4600 miles. Tire store didn’t want them at all. Will try Craig’s List next week.
I changed mine at 700 miles. Discount offered me $200 credit. I took it, it was more than I expected and I didn’t have to deal with trying to sell an 18” tire