What is the price range for a 380sl in good condition, all service records? New tires all maint. has been serviced well.

Was 81 the year with the single timing chain? Those models are valued much lower. If your car has the double timing chain it is probably worth between 8 and 12K.

You should check Edmunds or Kelly for best estimate. The 380SL didn't hold it's value very well because of the timing chain problems and underpowered performance.