We did the paradise cove luau and if I recall it was about $85 a person. I would not consider it personal and intimate. It is a luau. They are all catered to tourists. That said we had a fun time. If you would like to see photos from the luau here is a link to my hawaii photos. The luau photos start at photo #10

http://public.fotki.com/prncess674/tt/hnl/

I really don't think there is an inexpensive quality intimate luau on Oahu.