I joined PriceGrabber about 4-5 years ago... back then you would need to invest hundreds of dollars just to get some pricegrabber co-branding for your site. Then again, back then it was actually worth it.
I don't know if they're still allowing sites to do some co-branding ... you might wanna contact them and ask if they are
Here was my old co-branded site... drastically outdated layout, too... lol...
http://opentechsupport.pricegrabber.com
- T