My first transaction was selling a Camelot Technologies Lancelot Pro phono preamp. The gentleman was a Dr. of Opthamology. (eye surgeon) He too, was cautious about a transaction with me since I had no feedback at the time. I assumed the responsibility of sending him the phono preamp with no payment of any kind. Telling him that once he received it, and checked it out to be not DOA, he would send me my money. Fortunate for me he was the person he said he was, and sent me a postal money order. I guess I should look at myself as being quite lucky in that transaction.
