WOW !! I think that most Abarth owners would want one of these as well. Even better if the price were very low as well.
The truth is that unless someone finds one buried in an old barn, the likelihood of finding such an item, particularly without any damage, is extremely remote indeed.
I recently offered over $2000 for a very used AH block and the owner would not part with it for that amount.
Almost all of the AH blocks have been raced. Therefore they are all either 65.2 or 65.4 bore. I think you will find that most that have been raced have been blown up at least once. The ones that have not been blown up will probably have a cracked center main web.
If you find a block without any of these maladies, and it is advertised as an original block, then BEWARE, as it most likely is a fake.
Here are some hints as to what to look for.
1. All AH blocks serial numbers start with an * and there is no room between the asterick and the first number to insert another number.
2. All Abarth block numbers are 7 digits plus the asterick (*) in front.
3. The first numbered digit is almost always a 1, but I have seen a few that started with a 2
4. All 850cc AH block serial numbers start with 103XXXX
5. All 1000cc AH blocks start with 100XXXX
6. Most all Competition AH blocks start with 150XXXX
If the serial numbers do not match the above guidelines, then I would look very closely at whether the block is a forgery.
Hope this helps.
Paul