Now make the target price, with perhaps a forced minimum, and dynamically define it as the average price paid. Now it's getting closer to a free market auction

Now make the target price, with perhaps a forced minimum, and dynamically define it as the average price paid. Now it's getting closer to a free market auction, and should be getting a little harder to game. Now functionalize the price increase along business defined price-increase-heuristic. Now if they game your system, you should just hire them to work for you.