The UK has standard set prices, if you are not paying between these you are either lucky, or being taken for a ride.

1.7g = £10 - Tenth
3.5g = £30 - Eighths
7.0g = £35/£40 = Quarter
14.0g = £65/£80 = Half
28.0g = £110/£130 = Oz


In the U.S everyting is crazy, from the information I gather it depends where you are, who you know, and what quality your buying.