Trying to get an idea of direction

Hey, everyone!

I am creating a store where the purchaser creates the product, and then the price is determined by what "features" the user selects.

Here's the reasoning:

I'm selling a widget of sorts which can be customized (uploading a picture, entering custom text, choosing a color, etc) by the customer. A node with CCK fields is perfect for recording this structure, but the price should be determined programmatically, from the options that they enter. They could then re-order that same item again, or create a new one. They could even order several different widgets at the same time.

Is there a solution for this, or am I going to have to start hacking my own? I'm no stranger to coding, but I'd rather not re-invent the wheel.

Thanks!

-Corey