Nice set. I have a couple myself. These tend to sell for around $15-$20 (including shipping) on eBay. Most coin shops I see with them tend to sell these in this range as well. Link to eBay sold listings https://www.ebay.com/sch/i.html?_from=R40&_nkw=us bicentennial silver proof set&_sacat=0&LH_Sold=1&LH_Complete=1