I've bid 100-200 pc at a time before, but it's mostly when I'm in a hurry. I totally understand how it can be unfair towards new players who just want to progress on the game. However, it was confirmed that we're not getting the usershop search, sadly, but for good reasons too. That would make the early birds snatch all the rare items, possibly in batches, not giving anyone else a chance. and even if the amount of items you could buy per day was limited, imagine a hundred players looking to find the same newly-released item at the same time. At least items that were once paid thousands for lose value over time, so best you can do is wait a little :) There's no joy in beating a game too quickly anyway ^^