BTW, I learned my lesson about selling covered calls on BRK some time ago. Never again.

But calls can be used simply as a tool (I don't use calls to provide "income" because I don't believe that the buyers of those calls are so generous as to provide me with an income without receiving something valuable in return). In this case, if you are TRULY willing to sell shares at 510 because you think it's a good price now, you could choose to sell, for example, March 7, 2025 510 calls for about $4.50 and possibly end up receiving a net of $514.50 instead of $510 for your shares. It's not much more, but it's still a little bit more.

And since you're not selling all of your Berkshire anyway, even if the stock drops and doesn't end up selling for $514.50, well no big deal, you keep the $4.50 for your trouble, and you keep your stock as usual.

For people who absolutely positively have to exit the position, for example you're closing on a condo sometime next week and you need $X in cash to be present in your account for closing, then of course you need to sell the stock the usual way. But most of us here are talking about "playing around on the edges" of our positions.