Sold a late Bridgeport mill for $10,500 recently and the guy drove all the way from Indiana and paid in cash. I didn't demand cash, that's just what he wanted to do. He mentioned something about having to fill out a form at his bank to say what the money was for.... which gets me to wondering if me depositing his cash in our business checking might put me on an IRS hit list or whatever ? Wondering if $10K is the trigger point for that....