It might be neat if I could set up certain listings to direct markup fees to officially recognized charities. Maybe through something like Paypal's MissionFish? Not only would this be good for the charity, but it might encourage purchases. Sometimes my customers have passed on items because the prices are too high even when I sell something without a markup. However, if the customer considered the purchase as a donation, they might be willing to splurge a little more. I'd want to be able to pick from charities, of course. Things get so political these days.