I bought the GoPro ghelomet camera on Ebay for $250, then got the Eye of Mine u/w housing for $80.

Likes:great price, Small size, HD capable, 720P60 capable, very versatile, wide lens angle.

Dislikes: No back LCD so ya gotta get your "aim" right, which of course, I have problems with. No w/b correction, but its an easy fix to buy an oversized cc filter and velcro it on when you need it.