Mr. Andrea Tacchi has a 3- to 4-year waiting list right now. If you get on it before it swells to 8-,9-, 10- year or longer you may see your Andrea Tacchi guitar sooner than when you can find a used one in mint condition. And direct from Andrea it would probably cost no more than a used mint one.
If you need one like RIGHT now you will have to pay for the upcharge of not having to wait or be extremely lucky to find one coming onstream and even then it won't be cheap when in mint condition.
My advice is to get on Mr. Tacchi's wait-list. That is what I did.