Yes, finaly a constructive person, as you noticed I talk principaly about Marts items bacause they can be found in unlimited quantity when I need them to fullfil the stocks. For items like that we cannot find in Marts like Shell Bell, Leftovers and more who don't have a base price players can pout the price they want.But even for these items I sincerely believe that actualy their prices are too high, I support everyone with good intentions to put low prices on that kind of items to push others to sell these same items at lower prices too. If they sell at lower prices interresting items you will be able to buy them and make your stocks growing.
One thing I suggest to do is to buy some Luck Incense on Hoenn at Slateport City for $9500 and sell them a little bit higher like +/- $12000 like this you pay the ad cost and you give the chance to everyone, even noobs, to win more money and if they have more money they will come spend it in your stocks so you grow two times more faster.
And I dont care if that finally hurt my business because the most important is that everyone can access everything for little prices to make their adventure more enjoyable and the world more pure without all these selfish sellers.