How much is a Sear Robuck desk worth from the 1968?

Probably a garage sale item, what ever the market will pay. Goodwill is full of similar items for $40.

Sears Robuck has never made a thing so it's a vendor who builds items and puts the Sears name on it. ma0641 is between accurate and being very generous to you. Maybe if you posted a picture we could help more but unless it's a roll top or something unique I'd be hard pressed o find a buyer

I was trying to be optimistic!