Walmart.com has the Hot Wheels Sea Serpent Island Play Set: http://www.walmart.com/ip/Hot-Wheels-Sea-Serpent-Island-Play-Se
for $10 with free in store pickup.
Price comparison here: http://www.google.com/products/catalog?q=hot wheels sea serpent island playset&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&safe=active&um=1&hl=en&bav=on.2,or.r_gc.r_pw.&biw=1093&bih=391&ie=UTF-8&tbm=shop&cid=232023085363875393&sa=X&ei=UZQUTv7rHIimsQKc0tTUDw&ved=0CEoQ8wIwAA
.