All of the hairdryers I have ever owned in my life probably don't add up to half of that. : )
My diffusers cost around $15 and last for years. I have no experience with high end hair appliances, so I'm no help.
--I'm located in Western PA.
--I found NC in late 2004, CG since 2-2005, started going grey in late 2005.
--My hair is 3B with some 3A, texture-medium/fine, porosity-normal except for the ends which are porous, elasticity-normal.
--My long time favorite products are Suave & VO5 conditioners, LA Looks Sport Gel, oils, honey, vinegar.
--My CG and grey hair progress --