Why are the Monkey and Chappie bikes so expensive?

[Edgar]

Can someone explain to me why the Honda Z-series Monkey bikes and the Yamaha Chappy bikes are so expensive? Is it purely for their collection value? 

 

[Buddy]

 

[Edgar]

 

[Dwerg]

 

[Edgar]

 

[Dwerg]

 

[Rossdog]

 

[2StrokeDan]

 

[Mr D]

 

[2StrokeDan]

 

[NovaT]

 

[2StrokeDan]

 

[Dwerg]

 

[2StrokeDan]

 

[NovaT]

 

[WimC]