Smartmoney.com just had a nice article comparing various on-line pricing engines.
I've recently used them determine the current market value for new items I've donated to charity. Results were pretty iffy.
They gave their highest rating to nextag, I site which I hadn't tried yet. They have a very interesting price history feature that could be very useful. Smartmoney said it might help when looking for sales. I think it will also be useful in enforcing lowest price guarantees, ala the type offered by amazon.
Check out nextag and let me know what you think of it.
In January, Consumer Reports had rated shopping.com and shopping.yahoo.com as their highest with froogle, not far behind (if I recall correctly). When I try it, I'll be comparing nextag against those three.
Have a wonderful Thursday,