I am not sure if you guys have noticed but the prices of used slings seems to be going up. Take a look at this 17 SLR
https://www.cycletrader.com/li…ORANGE-MADNESS-5016496365
https://www.cycletrader.com/li…-Slingshot-SLR-5016904964
https://www.cycletrader.com/li…LINGSHOT-SL-LE-5016747922
Maybe it has to do with the current inflation on the car market right now OR that the older engine has become more desirable over the new one. Not sure