Check with your state department of natural resources to see if you can find a list of licensed fur buyers and then look for one in your area. My state has a list of licensed buyers right on the DNR website. Some local fur buyers are real good guys but most of them have gone out of business in the last few years and the only ones left around me are not exactly "salt of the earth" types if you know what I mean.
Groenwald & Co. sends out buyers on a delivery route. You can look them up on-line and see if they have a scheduled pickup near you.
You could also call you State Trappers Association. Sometimes they will have an auction or two during the year where fur buyers will bid on your furs and you can sell to the highest bidder.
I have been shipping to North American Fur Auctions (NAFA) in Canada. Once you get an account set up with them it is easy to use and I feel I always get a fair deal on my furs. It does take some time to get your money and all furs have to be stretched and dried before shipping.
You could also call Fur Takers of America or the National Trappers Association and they would probably be able to direct you to possible buyers for your furs.