I've just bought an Under Armour goretex paclite in Royal Blue from eBay for £100. Reputable seller, and got some left depending on size. Can't link as my phone defaults to eBay app when searching. Easily found though.
I've had an Ouul Python cart bag for best part of 2 years now. It's been in a downpour or two and is as waterproof as a duck's bum. (Unless, of course, you forget to close all the zips )
Its got two small soft-lined pockets - with same waterproof zips as all the other pockets. Whether they are specifically "valuables pockets" i have no idea. My only minor criticism is that it doesn't have an insulated pocket. But a "single-bottle" cool bag sits in one of the main pockets nicely and does the same job.