Quoted:
If one was found that was transferable any reasonable guesses on the investment to own?....also is thier a data base that's listing how many are transferable?
View Quote
There are no Beretta factory transferable 93Rs, although there are some Beretta presample imports.
The most common 93R Clone transferable guns out there are the half dozen or so Boatman/Bixler guns. There are rumors of some 92 conversions as well, although I have never seen one come up for sale.
My guess on pricing is that the aluminum Boatman/Bixler guns would be at least $100,000. The pricing could vary so much as one comes up for sale every decade or so and there are no shortage of folks with deep pockets to fight over it. That said, I wouldn't be shocked if one pulled double that.
The one titanium 93R Boatman/Bixler gun is probably $200,000 or more. If you search the archives you can see it for yourself as a member here owns (or at least owned) it.
The ATF has a database for all NFA firearms. However, its not publically available for folks to do searches. Suffice to say, transferable 93R type guns are extremely rare.