one to hear another good one? i was biddingon a 500e on ebay and was skeptical, and this guy was from europe. he offered to send me the unit to test, and if i was cool with it, i could send him the money order. unbelievable trust on his part. bidding ended at 350$, and he said that he wasn't sure how the preamp worked, puzzled i was like whatever send it. he sent me a AD1K!! everything works, and needless to say i sent a check immediately! i didn't have the heart to tell what he had without knowing, but i guess he got the money he wanted for it. thank you karma!!