You made me look. The bid on your 85 Jan 18 BRK.B call option is $61.50, and the ask is $66 (is that your order?).
Compared to the current price of $146, it looks like buyers do not value the option that much because $85+$61.50 = $146.50 being only 50 cents above the present value. At the same time, they are willing to pay $13.85 for the option to buy it at $145.
It looks like speculators do not like "deep in the money" options, and prefer the ones with strike prices closer to the current price. I think it provides them with more leverage. If the share price varies up/down by $15 and in the direction that they bet, they will double their money. On the other hand, "deep in the money" options do not give them such percentage gains.
It still does not seem right to me. However, if there's a flaw in the option prices across different strike prices, I am sure someone would find a way to arbitrage and make money out of it.
Someone more trained in trading can explain this, but I am scratching my head too.