I bought mine from Analogic. It's a DCE manufactured Blizzard with a 60Mhz CPU clocked at 66Mhz. It was a massive increase in performance over 1240/33 I previously ran and I have had many years of use since.
I don't think anyone actually sells them anymore, if AmigaKit gets one in it will be from an auction anyway.
What sort of money do you expect to pay?