They're a scam. Mark is quick to sweet talk you and take your money, he'll feed you BS excuses as long as you believe them and when you finally call BS on him, he goes silent. Happened to me and DOZENS of other forum members here and on another forum.
Here is my experience with him:
http://www.camaro6.com/forums/showpo...&postcount=121
After I received that part he also REFUSED to refund me money for a completely different order that was 5 months and counting since order date unless I sent the spoiler back to him yet neglected to send someone to get the spoiler for WEEKS until i finally filed a CC dispute. Once the dispute was filed I had delivery drivers showing up to my house while I was at work to try and get the spoiler back.
TLDR: The guy is a crook living on your long term zero interest loans, period.