Missing your 12 or 18 hour bonuses? Not to mention, this would require you to price low so that most of your goods sell off within a few hours of hitting the market. Or waste another 3 turns every time you wanted to sell more tech by recalling the unsold. Because you can only put up 1/4th of your total tech on the market, including what is on the market. If you put up tech and non of it sells, you would have to recall, buy, or tech more in order to place more. Then pricing low would drive the average price down further hurting techers.