Affiliate Marketing and eBay

This is an idea I've played with for a while. Suppose you were an affiliate for some kind of product that costs money, but isn't something that is often sold at a discount or sold used. Like a magazine subscription, for example, or herbal hangover pills.

And suppose you put auctions for that product up on eBay. And the person who buys it sends you the money through Paypal, then you log in through your affiliate link, make the purchase on the customer's behalf, have it shipped to the customer, then make your money on the backend commission.

Is this a potentially useful affiliate model? Has anyone tried this?

It's not something I have personal experience with. I'm just wondering about other folks who aren't interested in building content websites but want to make some affiliate revenue. This might be a viable, if work-intensive, business model.