Called into the tip yesterday afternoon and was shocked to find a FS38 in remarkably good nick. Good spark and compression. Paid $15, brought it home.
Re-threaded the line, put the plug back in, checked air filter, half a tank of 50:1 and a dash of 'Mechanic in a Bottle' additive and it fired up 3rd pull. Ran rough and stalled but came good after a minute and a slight twiddle on the mixture screws
Did the lawn edges for 10 mins and is running 90% - slight bog if the throttle is slammed on, but seems to be getting better
Worst case its a 15 min job to put a kit through the carby
Owner was presumably told the running issues could only be cured with a $35+ kit + $80 labour - thus making up over 50% of the original price and not worth it