I'm not going to tell you the players i "autobuy", for obvious reasons..
But, if you think out the box, and go for players that are less popular and are expensive, then you will make quite a nice profit. I have been using the autobuyer for a week now, since i'm on easter holidays, and i have made over 200k(not lying, i just know who to go for) in the first week. I am currently at 300k, and i search for at least 20 players at a time, which increases the chances of picking up good deals. Also, leave the autobuyer on all day, and then eventually you will be bringing in the coins, which can then be sold for some real coins
Good luck.