I dunno, maybe? It would certianly cost you $15000 to have one rebuilt if you owned it already.
The last TZ750 I saw for sale was at bonhams and was a no sale at an appraised value of £50000. This was for a fully restored bike with Gener Romero/Kenny Roberts history so who knows how much was inflated. The only one I saw sell before that was another english auction in 2004 and that bike with no history and needing a bit of a cleanup was £10000.
To be honest though I am not looking, so there may be other auctions I am not considering. I remember there being one on ebay in 2002 but I tuned out when the price hit $25,000.
I once passed on a TZ750 basket case in 2001 in Louisiana for $1000 because I didn't have the money. Bike was apart and had been fresh water flooded (pre katrina). Wish I had never passed on that.