Kyosho 1:8 K1 - Dash1 - gas powered RC car from the 70s

[artiversal]

Hi
I was lucky to get a very old Kyosho gas powered RC car. It was sold in Germany - so its a K1 - in the early 70s.
Since I have too much on my hands, with family, work and other hobbys, I would like to sell it.
Where would you recommend selling it - and what should it be worth?

Attached some pictures.

I also got a Tamiya RA-1206 Martini Porsche 936 Turbo, which seems to be quite old - this one is battery powered.
Please help me out and point me into a direction, what to do next.

Thank you!

 

[NitroR/C]

https://www.ebay.de/itm/233692997597

 

[artiversal]

Hi, thank you for the tip.
Is this a realistic price for the car?

 

[NitroR/C]

surely one tries .... I would stay on 700/600 euros. but honestly i don't know this kind of nitro rc.