I would say that a British Vintage 12 bore "best gun" can be had easily, easily at the $30k pricepoint. Heck, even at the $15k pricepoint if you shop hard. That would be the other "bargain" class of weapon I'm aware of today.
Now imagine a totally mediocre finished 410 or 28 bore side by side from a 2nd or 3rd tier British maker that is in no way a best gun. That could run you $30k.
@VertigoBE on this forum owns a best magazine rifle from an obscure master in 416 Rigby. Few rifles of that type would be its equal. He was able to acquire that rifle for a reasonable sum as well, largely because he's in Europe where there is less interest in best large bore magazine rifles. (it would have sold for double in the USA, easily)
So that would be the two "deals" in other genres where I think dollars can go very far.