Try selling a couple on ebay, see what you get.
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When I'm trying to price something unusual I usually search eBay for the item. It gives a good range for what people are likely to pay. In this case the search seems to indicate between $10-30, depending on the type and quality.
However much your buyer will pay for them. Do you have a buyer yet? Are the pelts sellable? What condition are they in? What did you do to preserve them?