$1 Range: A large plastic trash bag. Poke a small head-size hole in the bottom, wear it like a poncho. A plastic grocery bag around each foot and hand, rubber band around ankles & wrists.
$1000+ Range: This. http://www.aerostich.com/men-s-roadcrafter-classic-one-piece-suit.html
$1000+ Range: This. http://www.aerostich.com/men-s-roadcrafter-classic-one-piece-suit.html