Selling the sword for a million makes no sense

I might have mentioned this before, but.. none of the sword stuff makes no sense, when it comes to Budd.

Why would he lie about owning the sword? What does he gain by doing that?

If he's ready to sell the new sword to Ellie for a million bucks, why would he keep not onlyu his own sword, but the very fact that he HAS that sword hidden from everyone, when he could have sold THAT sword for a million bucks AGES ago?

It makes no sense for him to live in a miserable trailer, work at a miserable job, lead a miserable life, when he could at ANY POINT (and who knows for how many years) get a million dollars. Instead, he doesn't even admit to owning that sword... and YET, he's perfectly willing to instantly sell the next sword he gets his hands on for a million bucks?

So he WANTS to keep a Hattori Hanzou katana, but he'd rather have a million bucks than have another sword like that (or even better)? Make up your mind, movie, he can't want both things - at least not so desperately that he's willing to suffer for YEARS in that miserable life than just do the easy thing and sell that sword, _IF_ he is so willing to instantly do that very thing with the other sword?

Don't tell me there is some sentimental reason attached to his own sword, because it has that silly inscription on it. It CAN'T be worth his awful lifestyle and all that suffering, if he's so quick to sell the other sword instantly.

Why not add his own sword to the mix for two million or something? I don't know, I can't understand how any of this makes any sense, so it probably doesn't.