I responded to a bmwdoc.com Roadfly ad for used E24 parts in December 2006. After agreeing on the parts and prices with John Thies, I sent him a $150 postal money order in early 2007. The money order was cashed and excuses began. No parts were ever delivered and he never provided a serious or credible explanation despite several phone calls, voice mails, emails and a letter. As of September 17, 2007 no refund has been offered or received. I don't believe my experience with him is unique.