Update 3.7.3 Release Candidate 1
This update addresses some fixes to the Google analyzer, Content and Store modules and it also allows you to set VIP pricing for your products.

In the Options module, select the Store Options

Click on the "More Store Options" button

Select the "Allow VIP pricing..." option below, and set how you want the VIP pricing to be calculated. The pricing can be based on Group B, C or D prices or you can specify a percentage.

Every product will display a VIP price, unless you have running a store special then the store special will overwrite the VIP price.
The example below shows a Sale price item and a VIP price item.