top dollar
noun /ˌtɒp ˈdɒlə(r)/
  /ˌtɑːp ˈdɑːlər/
Idioms Idioms 
pay, earn, charge, etc. top dollar 
- (informal) pay, earn, charge, etc. a lot of money- If you want the best, you have to pay top dollar.
- We can help you get top dollar when you sell your house.