My friend found a Jotul F600 on CL for $600. It looks to be in great shape and is not a far ride to go pick it up. The seller does not know the age as the stove was there 3 years ago when she moved in. Questions: Is $600 good for the F600? Are they good stoves? Should we be looking at any specific areas of concern when picking it up? Any other feedback is welcomed!