I've got almost three years of use on my
Nashbar Townie Basket grocery panniers. When they're on sale they're $15-$20 each.
Others are more fashionable, but these were cheap and they work just fine. Not that it matters in San Diego, but they come with rain covers too.
I bought a pair back in July for $20 each with shipping, and I'm quite satisfied. But... the Nashbar site has them listed now for $30 each + shipping. They must have been selling by the gross back when gas was >$4.