The Negev and R8 Revolver were removed in the update on March 24, 2017. But now, Valve has just launched an update for Counter-Strike: Global Offensive and the R8 and Negev rework.
From this update, the Negev and the R8 have been lowered the price to ennable players to use them in a competitive environment. Valve just expects that the Negev will be a situational weapon that will require experimentation on the part of teams to be effective, so as a starting point its price has been lowered significantly.
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