Well crumpet,
It's your call, as to what it's worth to you. I guess that depends somewhat, on how hard it is to find decent secondhand edgers in your area. It may be OK value, if it has only seen domestic use.
If that Briggs has 'easy-spin starting' on the starter housing, it's a pre-1982 model. Post-1982 all had the Magnetron electronic ignition, and were so marked.