It's a pet peeve I admit, but it gripes me when sellers on this board and elsewhere expect potential buyers to add a certain percentage to cover the seller's Paypal fees. Doing so is clearly a violation of Paypal policy. Some sellers try this unethical ploy even when stating they prefer to use Paypal. My advice is to ignore these sellers completely. If they'll openly violate Paypal policy, how can you trust them at all?
Sheesh... rant over.