I looked at a couple decent quality ones on Amazon, each is rated 4.5* over lots of user reviews.

• HUNTVP 27L waterproof, $110 / pair
  https://www.amazon.com/dp/B08TB8CVM2...v_ov_lig_dp_it
• Rockbros 27L waterproof, $125/pr:
  https://www.amazon.com/dp/B07R527WNN...v_ov_lig_dp_it

Then I decided: "What if Ortlieb used cost about the same as those new?" and looked on Amazon. Turns out that one can get NEW Ortlieb for just a bit more. I got a set of red Back Roller City 40L for $135:
https://www.ebay.com/itm/156638429370


Stock photo; can't wait to fill these with groceries!


I did look at some American-made ones, but they were either in a bunch of fruity colors or not waterproof and are at least $150 ea.