After This Slingshot I will probably not get another. Ticks me off Polaris is pumping out 2-3 models a year and changing every time. I get it, keeping up with what people want, but when a SS is "Out dated" a year later, Not good for owner. Plus trade in will probably deplete like crazy. MHO
While Polaris does make model changes several times per year, every Slingshot produced to date still has varied only in the cosmetic aspects and still has the exact same motor, transmission, drivetrain and steering we all enjoy/suffer with, so I don't really see anything other than how old, how many l miles it has and how well it's been maintained affecting Slingshot value.
You can get a kit or a complete version. Kits are about $25K and complete is about $35-$40K. The company is about 100 miles from where I live. They contacted me last year and had a rolling chassis complete, with everything, minus motor for $22K. I was all set to buy one a couple years ago, before the SS was released. I went with the SS and having a ball!
While I don't mind the looks of the T-Rex and its clones, none of them offer the level of engineering safety (aka nanny controls) at anywhere near the Slingshot's prices.