Source : Webster's Revised Unabridged Dictionary (1913)

Outsell \Out*sell"\, v. t.
   1. To exceed in amount of sales; to sell more than.

   2. To exceed in the price of selling; to fetch more than; to
      exceed in value. --Fuller. Shak.

Source : WordNet®

outsell
     v 1: be sold more often than other, similar products; "The new
          Toyota outsells the Honda by a wide margin"
     2: sell more than others; "This salesman outsells his
        colleagues"
     [also: {outsold}]