Hi Roy,
So, in general, the retail price of a single speaker is 10x the driver cost. It goes up and down, but that’s it in general.
So, it pays to go with a custom-speaker builder for a good design. Taylor, Selah, etc.
Otherwise, for a $5,000 pair, on average, you’ll be getting $250worth of parts (retail) in each.
There are some exceptional values though, Monitor Audio among them, which I consider very good sounding, but since they make their own drivers, it's quite likely they are actually charging more than 20x a single speaker.
Lawrence audio is also another company that has exceptional value in terms of parts cost.
NONE of this makes a speaker worth buying though. :) As @bassdude said, the whole package matters.
Best,
Erik