2-piper, You may be correct...your memory is usually pretty good with regard to this type of "stuff", but I have never read where their was another amnesty period...at least with regard to the Ithaca A&B.
One other note of interest: The records show that Ithaca produced a fair number of A&B's...over 4000, however, no one but the BATF know how many were registered and are now legal. Several years ago I queried the BATF on the subject but they claimed that the software was not available to provide that information. I guess if one really pushed it and would pay for the software modifications and the time involved one could find out. Judging from the number that have appeared on the market there are probably less than 10% that are legally registered...and possibly only a couple of hundred.
Donnie, why don't you bid on the one at Julia's? It might go for a lot less than 5K...you never know with an auction.