really hope you get what you want for it....

being in the car business....as you know- - the (very subjective) perceived market value can be a moving target based upon:
>buyers (+/-) value of the mods
>maintence and repair and accident history of the car
>current overall state of the car taking into account its a '92
>overall wear and tear on the car/ life left in the car
>etc.

Ballparking
>Kelly private ~$14.5k
>Autotrader '92's ~14.5k-$25.5k(new motor and trans in it)

Although the overall used MB car market appears to very soft in pricing and abundant in inventory, I've observed no reduction of interested prospetive 500e buyers/owners.

hope this helps and let us know what turns out
-fad