I've had the luck to own two 303s in my lifetime. The first one I got for $50 but ended up crapping out soon and I didn't realize at the time what a great machine it was (it was the late 80s).
The next one I bought from my buddy Kyle (KMH below) and then we used it on the debut single on my label Barely Legal Records.
Unfortunately they are no longer in my possession...le sigh.
"Dai-Lo" with KMHapple music / iTunes
"Supernatural" with John Selway