I promise you that a replica tourbillion isn’t functional. Just like there are no replica watches with real perpetual calendars.
Some replicas are remarkably good though. The new Panerai Ferrari line are all 1:1 replicas, meaning you can use genuine parts if you wanted to.
The biggest downside to replica watches though is the fact that sure you can buy 10 replicas for the price of 1 genuine watch, and that’s fine. Unfortunately you have $3K in watches that have no value. Take that same $3K and you can trade/sell for different genuine watches as well.
High end watches rarely drop significantly in value, I’d be surprised if that B&R ever dropped below $2400…since B&R is a new company and it’s their first significant anniversary watch it can actually increase in value over time.
Pan’s generally sell for 75% of original value or higher.
I don’t know much about the UN but I’d imagine given the discount on the list price it wouldn’t drop in value much either.