We buy used Keens. Also wide feet, low arches, buy on e-bay. I've been nothing but happy with my purchases. My daughter loves Keens, she literally starts prancing around when she gets them.
Most people don't sell very used shoes on e-bay. Good sellers take pictures of the tread, the tops, you can tell they're hardly worn (by our standards... if you have two pairs of shoes, they get worn a lot, LOL!).
My thing is, a pair of used Keens is still WAY more supportive than most of the shoes we could afford. I've paid an average, including shipping, of $25/pair and now we have them in every size and DD2 wears her big sister's.
Sadly now that big sister's getting older, the wear is way more noticeable and I think I won't be able to hand down shoes from this year to little one. I didn't anticipate that, but they're really worn at the heel and I can't see any child wearing them for anything other than dress up.
It's not that the stay-at-home-parent gets to stay home with the kids. The kids get to stay home with a parent. Lucky Mom to DD1 (4 y) and DD2 (18 mo), Wife to Mercenary Dad