This feature is limited to subscribers of the MFG services for manufacturers. The buyer profile is where you can find all the information for buyers and their historical RFQ activity on MFG.
The buyer's profile can be seen by clicking on the buyer's name on the RFQ. The buyer mini-profile will pop out on the right side of the screen. You can see a fuller profile of the buyer by clicking on the View Full Profile button.
You will be able to see the rating and reviews for the buyer as well as the pricing and award pattern for the buyer.
A brief video of the feature can be found here.