The golden bi-centennial set is worth $1.75, really nothing more than face value, though to younger collectors possibly $4-5 most. As to the proof sets, do you have the origional packaging? if you have ther packaging thay came in, thay are worth $5-10, if not, you could get $5-8 for them. I go to a monthly coin auction and have seen some proof sets go for as low as $3, and some as high as $50. Hope this helps!