I have had multiple dealings with Mark. I have never had any problems. His descriptions were right on and his prices for the item and for shipping was fair. I know Mark is not in the best financial shape right now and this may have clouded his decision. However, it sounds like the OP might have gotten mad or just changed his mind. Maybe he found a better deal. I don't know and I don't care. I say we cut Mark some slack and let him make it right. I would buy from him tomorrow without hesitation if he had something I needed.
