You dont just download one off the internet bro or get one for free more likely be fake, key-logged or just wont work so well bugs bad speed etc.. if you seriously want a good working trusted auto-buyer use a website like freelancer..you can pay a professional that has the skills required to make you one or you can easily find someone who has already made one (to avoid scams just deal with people who have taken on loads projects and had good customer feedback on the work he's done) and then your have a trusted auto-buyer that actually works and does it job..... I know prices can vary with AB as some have better features and better speed than others just so you have rough idea the low end ones that dont work so well and probably have 100s people using same AB cost around 20£-£50 probably get around 10-15k on a good day if have right player put in the AB search average AB will cost around 60-100£ and make good 30-40k maybe more on busy days where load packs are being opened and the the top end ones you can have made or buy if your lucky enough to find a genuine seller who's made one and will sell to you will cost 200-300£ and will make a easy 60-80k a day and thats good as you can sell 100k for around 8-10£ hope information helped you.

would you mind posting the link to the auto buyer on this site?
cheers