Man, we gotta love all of these Bitcoin purchases in the past and the sellers didn't accept any of these offers. I'm sure that there are other documented purchases that ended up the same.
It could be that the seller also wanted to do something with the money, so even if he or she had accepted the offer to accept Bitcoin payment for that property, he would have still sell the Bitcoin and would not be holding it till today. There were many old Bitcoin investors but only a few would be holding their bag till day. The seller of that house might regret why they rejected the offer but even if they did, they could have sold when price got to around $1k.