I sold my Blizzard 1230 IV 50/MMU/FPU/32 for not more than €45, more than that, to be honest, I find rather expensive.
The 030 based accelerator cards are the ones, I believe, that have sold the most and they are not that rare. Most A1200:s I've seen being sold, second hand, over here in Sweden comes with one...
I might be wrong here, but my experience tells me otherwise.
