Avoid fees? Just raise your account 10% If you're selling for $100, raise it to $110. Problem solved. No upgrade needed. We also pay your paypal/seller fees and cover you from chargebacks.
Same thing sellers do when they sell on amazon.com. They have a computer they want to sell. They raise their price 20% to cover the Amazon Fees. Our fees aren't 20% but that's just an example.