I'd certainly consider it.
#1 - It's a Bernina
#2 - 930 is one of the real workhorses of the Bernina line and still much coveted
I don't know about your area, but $600 is a good price for one here. They usually go more like $800 and sometimes $1,000. I have one my husband bought me years ago that is not in good shape and needs a new needle bar. My OSMG asked if I wanted to sell it and said he would give me more that the $400 my husband paid for it.