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Also make sure you have this on your "Wish List" from the item description for notification if it pops up Bill.
There is no way of knowing when it will be back in stock. Recommend you add it to you wish list, if you haven't done so already. Bud's will then notify you when it is available. You may want to consider becoming a Team Bud's member, if you aren't already, as Team Bud's get first shot at hard to get items and it will make layaway an option for you as a TB member. It last sold for $699.
You also may have to check some online gun and auction sites to perhaps find a new or good condition used one as online vendors all show "Out of Stock".
I just looked at no less then 25 vendors, and nobody has one. Your best bet is local shops or gun auctions at this point. Its a pot of gold nobody can find.
Put it on a wish list and you will be notified when it comes in.