[Palum6o]

I'm not sure if you can get the Red Book info online but that has all the prices in it.

I also used to use Costco drug pricing as a reference:
http://www.costco.com/Pharmacy/frameset.asp?trg=HCFrame.asp&hcban=Banner.asp&hctar=finddrugs.asp&catid=678&fromscript=1&Article=pricing%20information&log=