That would make sense. We took it out of a large Victorian home after closing a nursing home. The Bookcase was used to store medical charts. Being built for the spot would make sense in that…it was always there.

Thank you

No, the pegs or dowels in this case are to attach drawer front to drawer rails. This looks to be late 19th – early 20th century bookcase/ china cab that was probably built on site in the victorian era for a large house.
As to value, I dunno but not as much as you think as large victorian pieces are just not bringing a lot these days in the middle market.

The side boards are 3/4″ thick, whereas the from of the draw is 1 1/2″ thick.
Does the pegging make a big difference?

Looks like the framework is pegged,,how thick are those boards the drawer frames are made of ?? Looks like over an inch !!

Yes, here is the pic of the drawers.

Thank you