I have visited many such graveyards in North America (there are many) and often times the owner is more than a little eccentric, sometimes extremely so, almost to the point of mental illness with hoarders' disorder. Often they will refuse any offer on any item, and if you push at all, they just say "see you". Obviously the collection in the photos has been there for many years, the newest vehicle being a mid 60's Pontiac sedan. I'll bet this guy refuses all offers fair or not and intends to take the collection with him when he passes.
I was told one such fellow in his 60's had a mental block about selling anything in his huge inherited collection because his long-dead father always told him forcefully from an early age that he should get about twice the going rate for every item whe selling. He had imprinted on the son by his continuous harangue that all his stock was extra special and thus worth more. The son was scared to sell thinking he would make a mistake and let something go too cheap, dishonouring his father's memory somehow. So, 30 years on, it is all still rusting away to worthless piles of brown oxide dirt, not even enough left to use as patterns in many cases.
Once many years ago I was at a public sale of four steam traction engines locally, where there were over 200 potential buyers present. One rare engine started bidding at $50,000 and quickly reached $200,000, an unheard-of price locally for any engine. The two bidders were famous local trucking and brewery millionaires building collections, so real live cash money was on the table. The auctioneer reached that peak bid, announced that it still did not reach the reserve, checked with the owner to see if this huge bid might be accepted, and he shook his head no. That engine and 2 others now continue to rot in the field.
Senseless and sad.
JD