Bottomscanner is an addon that is packaged WITH AUCTIONEER.
You do not need to change the LUA or any other retarded bullcrap...
Go here
http://auctioneeraddon.com/
DL and install Auctioneer.
lemonnns is 100% correct, it did once autobuy the low price items for you. Now you run Bottomscanner and it asks you every time it finds one if you would like to buy it. You must click yes. Then check your mail, collect the items, and let Auctioneer relist them at proper prices to reap a proffit.
So... YES Bottomscanner works. But the "it's back" is retarded, it never left, you just had to get the beta until the stable hit like 3 weeks ago... I used the beta and never have done without Auctioneer and Bottomscanner, both have always worked, and STILL DO. You just have to go to the site and DL the new version periodically, just like any other addon...
Not only do I NOT give rep for this moronic post of "I think it maybe works if you change a bunch of crap you do not need to change" but I ask you to PLEASE not post unless you have some idea what the hell you are talking about.
And that LUA "hack" switches Bottomscanner to click yes automatically. Dude... leave your LUA alone and look at the buy before it buys it. there are good reasons the designers changed that autobuy to something you need to look at for yourself before it spends your money...
Alot of morons list crap like "Living Ruby" for 3000g because they are stupid. This will taint your auctioneer price lists and cost you money when it buys them for normal and tries to sell for way too much. It is MUCH MUCH better to read for yourself and use common sense on the buyouts, and it is no effort at all to see what it is and click yes and no... It would SUCK to buy a Living Ruby for 750g because people have listed the same one for 3000g for 2 weeks and your auctioneer is confused. Meanwhile, on any of the 4 servers I play on, you will be lucky to get 250g out of that living ruby, (GENERALLY they go under 100g!!! There are way WAY too many Jewelers in this friggin game right now!) costing you 500g in one whack!!! Common sense is better than any software, so use some.
Other commands you want to play with:
/auctioneer load always works with this package too, and is far more useful since it lets you see AH averages on ANYTHING you mouse over. Great for when a blue BoE drops in an instance and people rolling want to know what it sells for.
Go DL the mod, install it, and love it.
And STOP POSTING RUBBISH! Research before you post about how some friend of a buddy's cousin's ex GF's new BF said this may work... its not that hard to google Bottomscanner, find the website, and try it yourself.
Hell, I am going to go put together a guide for using Auctioneer, Bottomscanner and maybe Gatherer together tonight, just to avoid any more of this retarded nonsense.