Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
The price is up to any provider of servicing to you. JustAnswer can however advise you as to several repair firms that do offer estimates of cost before servicing.
for instance, offers a custom quote, on the Nikon P510, which says that an LCD screen repair will cost a price quote of $ 137.50
(before shipping...see http://www.unitedcamera.com/store/item.aspx?ItemId=40445#ShowSelections )
and www.precisioncamera.com also offers a price quote (that I can't make to work right now.)
And then there's Nikon themselves... you could use this facility to locate a repair center near you, and call them to ask for a price quote, too:
Is this the data you wanted and are asking about?
I got to Precision Camera's price quote for the P510, they say 137.50 (possibly plus shipping) also. So that's about a standard price.
Does this information answer your question satisfactorily ?