I just want to mention, as it seems that its been overlooked , the buy it now price on ebay is for people who are desperate and want the card immediately, the card goes for about 1/3rd to 1/2 , the asking price on ebay auctions or Amibay, I would just keep an eye on there constantly , if you dont mind waiting for one to pop up.
Is it worth it tho?
That depends on the person, in many way all of the equipment we own can be argued that it isnt "worth it" , even the sought after Amigas can be argued to be not worth it, as emulators do exist, but this is no different than any other hobby like vinyl collecting, vintage cars etc... we do it out of enjoyment of the hobby itself, the act of finding, restoring and testing is where we get our pleasure from. If you look at it in that light "Worth it" becomes a non-issue