It would be pointless to sell these Speeders on the GM, for the simple reason nobody would buy them.
For example, the cost of a level 3 speeder is 55,000 creds, the purple mats alone for the Cybertech version would value it at over 100,000 creds, and there is only 1 version (no colour variations or style variations) So if we do make one and put it on the market for approx 150,000 credits to make a slight profit, how many would you expect to sell at 3x the price of any other tier 3 speeder?