I was only really familiar with the price of Strength 2 and Speed 2, and it used to cost 130 to get a set of those. The price on Strength was increased, I guess so that the people with iron and diamond would live longer since everyone was able to afford the potions (and these two potions together are really OP). The price for Strength 2 is now 400, and Strength 1 is 300. I believe Speed 1 and 2 are the same prices as they've been for a long time (could be wrong). I think it would make the game a little more fun if the prices were lowered just slightly. Maybe Strength 2 shouldn't be lowered all the way back down to 100, but maybe 200/250?