Garland Range value
 

Saw a previous thread on this but my situation is somewhat different;

I have a used 60 inch commercial Garland range to sell. It was installed in the house we bought and we would like something smaller.

It's in great shape and looks barely used. However, I checked the serial number and it seems it was installed when the house was built in 1986.

What is market price for a range this old if it still looks and works well?

Thanks!