My response:
Something smells real bad about our writer's situation. I can't say for sure, but I'll bet you dollars to donuts that this situation is an ongoing scam and "enterprise" for our writer's sellers. I think we might have a RICO situation going on.
I'll further bet that if our writer checks the history of transactions about this property, that our writer will find, since 1968, the sellers have sold this property numerous times, and have purchased it back, having made similar offers to each of the owners. I'll further speculate that each of those buyers were aged, or otherwise not in a financial position to fight the seller, and eventually decided to sell the property back to the original seller at a huge loss due to the same facts, and due to an inability to fight back.
If this is the case, the property seller is engaged in an "enterprise", never having the intent to allow ingress and egress rights to new, third party buyers, and thus placing the property owners, like our writer, in a "squeeze play" leaving no other alternative but to sell the property back to the original owner at a "discount".
Nice way to make money - - but, it smacks of illegality.
I'd spend a few hundred bucks, if you can, to have an attorney review the history of this property, and to determine if there's an ongoing pattern amounting to Racketeering going on. If that's the case, the RICO Act allows for attorney fees.
Check it out as soon as possible.
IAAL