“Is $2,844 too much to pay for a fuse?”
Not if the fuse is your spouse’s - self preservation often trumps the bank account 
“Is $2,844 too much to pay for a fuse?”
In a word...Yes.I imagine though that someone will think that if it costs that much it must be worth it, just not this guy.

I have relatively new Audio Research equipment.  Not long ago I contacted Audio Research for their opinion on the value of using more expensive "audiophile" fuses.  Their response was essentially if they made a difference, we would use them!  One cannot argue that AR doesn't want to use better fuses because it would increase the selling price of their equipment!  
You fuse, you lose!

I would definitely pay $2,844 for a fuse . . . If Jimmy Page or Robert Plant came to install it and play Stairway to Heaven or In My Time Of Dying to enhance the soundstage!