The biggest issue Ive noticed is so many people saying "sending payment now..." or expressing alot of interest just to forget about it. A few days later nothing, week nothing, 3 weeks nothing. It really sucks having boxed something up and have it sitting in the car to never get payment. I had a set of quarter windows in my car for a little over a month... just dropped them off at UPS yesterday! Had the same problem with an intake manifold, armrest and a few other things.