It is best to get a Varieze friend of yours to go inspect the aircraft---or pay someone familiar with variezes. The wing joint area is a heated topic of debate----the bad news is that if you happen to get a varieze with this (evidently rare problem) problem, you may not have a flyable aircraft.
Watch out for guys trying to rip you off. I always say that the builder/owners character plays one of the most important roles. I know of a guy who freshly painted his aircraft to specifically hide a multitude of sins including a spar/wing joint problem as well as a fuel leak. The airplane may never fly again. Eric Cobb inspected his aircraft after the purchase, downed his aircraft, and could not believe someone was selling that kind of junk. A knowledgeable eye will can prevent you from making this mistake.
When I sold my Longez (and cars also), I point out and document every flaw that I am aware of.
Does your seller do this? I would also walk away from a seller who is not very knowledgeable about the airplane----unless they are selling for the deceased owner/builder-----but in that case, check the reputation of the builder.
If you ask around the canard community, you will be able to find out what kind of reputation the builder has.
Biggest advice-----don't buy it based on what you see----get help
