Hey Chris. I’ve seen a few customers use Extended Pricing to create Customer Specific price lists. I do agree with Ken that not all ISVs and Integration Tools work well with Extended Pricing, so you really have to look not just at what extended pricing can do, but how it will fit into your Dynamics GP Ecosystem.
Rockton Software currently owns and supports Omni Price as well as a new pricing tool they have developed called Rockton Pricing Management. And Cavallo’s SalesPad product has some good pricing features as well. So, there are lots of options to consider for advanced pricing functionality with Dynamics GP.