There’s a bit more than the sale price in regards to frets. No two necks are exactly alike. The age of the tree, the time spent and conditions during seasoning, the machine or builder installing them, the alloy used and on and on including good or bad luck during shipping and storage at the distributor and the store.
Yes, an expensive guitar should have good fret work but IME to get a guitar to intonate perfectly all the way the top with no buzz or funny business it usually and unfortunately costs a lot more than $1800.00.