auction and botters

hello, i experienced a problem at auction house, on one of my chars i do have mining+blacksmithing so im slightly farming and buying materials from the auction, then crafting gear and selling it there...and the problem is that it does not matter how hard i try, there are always ppl with price lower by 500 or 1000g, even when my price is on the edge of profitability. the question is, how can they sell it so cheap? when i think about it, its of course their business for what price they sell it but who would farm mats by himself and then sell it that cheap? only the one who did not farm it himself. so clearly there are ppl using mining bot and crafting underpriced gear...so i can just delete blacksmithing or is there anything i can do about it? maybe GMs should improve/change their bot detecting somehow...