I bought an 8500 refurb from "The escort store" on eBay and having "K" band bursts for no apparent reason. I live in NJ and rarely do the cops use "K" band so I thought it was a Cobra detector or something but it is happening more frequently. Anyone hear of this? I sent an PM via eBay but I think the contact comes on this site as well? What is the best way to reach him?