I don't peruse the ads to look for a bow to buy. I have a specific bow in mind, including length, weight and condition. If I find it, and the price is reasonable, I buy it.
I won't pay the 3% fee that some sellers try to push on to the buyers though. Why should the buyer pay the fee? The convenience and safety features are as great or greater for the seller. The seller gets the money immediately and the money is guaranteed. No hassle worrying about bad checks or fraudulent money orders.
In all other financial credit transactions, the merchant/seller pays the cost. (Now, they may incorporate that cost into the price of the item, but they pay for the transaction.) The buyer, of course, also pays interest on the loan, which is what a Paypal transaction is. Why should he pay the seller as well? I won't.