101307 Compare Prices Script

I am looking for someone who can create compare script the same as that used by greasypalm. All the similar functions must be there. The script must be very adaptable in that if i wanted it to compare DVDS but at a later date wanted it to compare music cds it would only need minor changes. Please with your bid explain how you will achieve this. Also you must look at how greasypalms site facility works to bid on this. This script is needed urgently.