I just noticed even the 53 is a 2 door model, looks like the shadow of Kaiser Deluxe on the front fender.
Of the 3, I would take the maroon car. I like that color and hope it is an original color offered, even though one might likely need to redo everything.
I applaud this seller, assisting the estate, but don't see anyone coming to get that spare motor. As I understand it, unless I am getting confused by all the photos and descriptions, the green car has a Hydramatic. This makes it a bit more interesting in that would have been a major option in 1951. Making that perhaps the most interesting buy, especially with a NOS hood. I personally would want that hood put on at the site, and toss the bondo one, but I am sure the estate agent K8096 would not like that.
Just not sure there are any collectors out there that are going to go in there for any amount of money and "help" this estate out by clearing all things Kaiser from the property, probably even for free. If a person lived 30 miles away and would take everything, you would need an acreage or rural property to place all 3 cars and parts. Thiose kinds of folks already have dozens of cars. That is why I often say that old cars are not scarce, there is a surplus in the U.S.