Looking at getting a pair of panniers for general use, shopping etc. don't need to be 100% waterproof. Some seem too cheap to be any good, but it's not something I have ever bought, so havn't a clue what I'm looking at.
Sure that's for a pair and not one?If you are after quick release and cheap these ( link below ) are just the ticket <£15 for the pair
...
https://www.planetx.co.uk/i/q/BABSMP/bike-smart-metro-pannier