Nice old wagon.Looks solid (need more pictures) but,shows her age.Needs a full restoration. $5600 is to high.The miles is around 136,000 plus.Needs a engine rebuilt and that cost money.Then paint,parts,etc... (like brake,tires,drum,rotors $$$$) You can't go by book value when it not a 1or 2.Its more like a 4.She does have a plus with power window,seats with third row,woodgrain,roof rack.She needed more up keep to get $5600.Start around $2500. Will make a good restro if the price is right!
I keep looking at the pictures posted.She has alot of good.The dash,seats,door panels are in good shape.It just that high miles and maintenance (wear and age).It will cost money to replace the wear items.The owner did say it was garaged.It looks rust free.
Why would 336K miles necessarily be a third engine? I know several big-block Mopars that are running 250K+ miles on the original engine, with normal maintenance such as timing chain/sprockets every 125K miles or so.
You should be able to find an older wagon in the 'good' to 'very good' category for something in the $6-8,000 range. Now, people with old wagons in the 'poor' - 'fair' condition range are trying to get the higher prices.....