E-bay has them from $.99 to $125 right now. Completed listings show they go from $35.60 to $71.59 with shipping and handling.

Craigslist has one out of Raleigh NC listed for $30.

Shop around you'll find one at a price you like.

If you're trying to sell, it's difficult to get "an average price" because different regions with different economical status will cause the selling price of items to vary widely.