Yeah, I think $69 for a coin door is nuts.... you usually can find a nice one on Ebay for around $40 (which includes shipping). Better yet, if you can find any other arcade vender around your neighborhood, chances are they have one for even cheaper..... at least I have had no problem finding one.
I got my 4-slotted coin door for my 4-player cab for $30 (that included shipping) from a vender around 200 miles away from me.