I say go for it! Make the site. I for one hate E-bay for amiga items simply because half the stuff on there is being sold by people that have no clue what an amiga is and charge way to much for the items. I say a CSPPC go for $980USD the other day!!! It was even a DCE made one! thats just insane for a card that was over five years old and selling for more then new.
