Here in Japan there are quite a few used ones, too. However, cars like an RZ High Performance in very good condition with something like 15,000km are not very common (only a few on Goo Net, for example), and still selling at as-new prices.
I was considering selling, and I've had several offers lately for what I paid. I'm just having a hard time letting go of it... I think the main reason for so many in the used market here is that a lot of people bought them as their only daily driver, and the car is a poor daily driver. It's actually an exhausting car to drive compared to something like a Yaris Cross or Corolla Cross, which go for millions of ยฅ less. My wife, who has driven all of my cars in the 35 years we've been married, commented that the Yaris is "exhausting to ride in for any significant distance." Older people in their 50s (like me) bought them as a throwback to their younger days and found out they actually wanted a Lexus