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You can just type a name of an item you want to inflate in, set the price to 99,999 (that'll buy everything) and then press start. After a few minutes you'll have plenty of that item, and you should start using quick stock to add them to your SDB incase you get 50 items in your inv. (then the buyer will stop), and then you have a nice stack of the items. You should check the TP and buy out anything left, then continue jacking up the price. Also, if you're still worried about the auto buyer, just make a test acc, and run it on it with an item say, pile of dung, and then run. If you're still worried, just use it on sides. I can trust you that it's 100% legit.
IIt would be hard to buy out all of a cerain item, demand and number of items in circulation would affect this. But in theory, if you tracked down a retired book( for example) and bought it all out, you could raise the price to whatever you want. This would be possible, and I have tried this before. I bought 2000 copies of a retired book raising the price 300% but was never able to buy it all. I eventually got iced on the account.
Here's a retired book you might want to work on if you have the patience: Seasonal Faerie Tales. It's from Advent Calendar 2003. I'm sure you could jack up the price to at least 500k.


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