What about having a forum for good deals on different products.
The forum could be set up so that the title of the thread is the product and each message in the thread would be the best price found (so far) for that product. For example if I saw a good deal on carbon fiber cobra R hood 99-04 I would make a post with

Carbon Fiber Cobra R Hood 99-04

I found a great deal on carbon Fiber Cobra R hoods at www.aftermarketblahblah.com for $300.00 and free shipping!