you are not seriously looking for 150 night in Positano this summer are you?
One of the most expensive places in Italy....

Last year we walked into Hotel Marmoratta (sp?) a Best western in Ravello which is on the Amalfi Coast somewhat near Postiano and despite rates posted on internet of 250+ we got a great room on the sea for 165euro we were very happy with it..

4 years ago off season got La Sirrenuse in Positano for very low rate but it was still about 250 euro