That's around $260 per Bitcoin on that time.
Now, that 50,000 Bitcoins is now worth $5B ($100k/btc). Yeah, that's a lot now and if that deal went through there will be for sure some holdings left on that seller but it didn't happen and the seller didn't like the idea and the worth of its valuation at that time because the value and the listing price of the apartment should be around $13,950,000 - $14,000,000 compared to the offer of the buyer which was valued less than approx a $1M.
If Bitcoin was valued at $260 per 1 and the offer was for $13,000,000 in Bitcoin when the apartment’s valuation was less than $1m on the market, then it’s such a huge loss for the seller. Not just in that time but, even now and it gets worst.
What would have been the issue would be widely lack of understanding. I don’t see what would have been stopped the seller from selling the Bitcoin with the then price and get its fiat value. When you don’t believe in it, it comes to hunt you in the near future. I’m sure the seller still considers his decision up to this day.