How do I know I am offering the best price for my products or services offered through my GSA contract?

If your GSA contract was awarded, then your Contracting Officer has gone through the efforts of assuring that your products or services are competitively priced. In the Negotiation stage of getting your GSA contract, you and your CO talked about their findings, and they may have recommended that you offered a better discount to the government on your GSA schedule.

Aside from this, you can compare your prices directly to your GSA competition on GSA Advantage, by simply using their search feature.