I actually did manage to be able to buy 2k nether wart for 10k because the price was suspicipusly at 5 meebles exactly for a bit too long, then it charged me the 10k and gave me NOTHING, aboslutely nothing.
Oh and since the prices of mine carts with tnt were higher than the combined prices of tnt and minecarts, I bought 1k minecarts still thinking they would stack, for around 305k, I got an inventory full of indivigual minecarts and nothing else, no item drops on the floor, NOTHING, so I basically lost 295k on a glitch, WTF?