how much is a royal doulton glenbrrok sink worth?

Answer 1

THe honest answer is as much as you can get for it or howevermuch people will pay.
It largely depends on its condition, I am not familiar with this particular style although I am very familiar with Royal Doulton Sanitaryware. The problem is that unless it is a very unusual shape and no longer available it is not going to be worth very much maybe £15 -£20. The effects on the market are reasonably catastrophic since the big DIY stores went into the mass cheap sanitaryware market. Another factor is that inspite of the quality the Royal Doulton brand no longer holds the esteem of others such as Villory Boch