You don't even have to leave your PC. Just send the funds electronically (or even paper check) to those who are doing the buying and shipping. You'd be just the financial clearinghouse. A dedicated bank account would be a good idea, though, just so there's no chance of comingling.
Maybe if you stopped by PayPal, and looked at their non-profit "stores", you'd get an idea of how they work. Everyone could certainly mention the PayPal "store", but ecurbh could also have a full-time link (with the highly desireable credit card logos) on the web site.
And I hate shopping, too. Or at least, going out to go shopping. I buy everything I possibly can online. No driving around (that should please the liberals), open 24/7, and I save on state taxes while the "internet tax holiday" is still in effect.