Eurocharged programmer, value?

[Dogbash]

Hi everyone, just sold my C63 which I had purchased the Eurocharged programmer and tune for.

I paid around a thousand pounds from memory although it was a long time ago now. I've spoken to Jerry at Eurocharged who said it would be about $500 to reprogram to another car. Any idea what kind of price I should advertise this for?

Thanks,
Andrew