Mine don't wear their black school shoes very often. So I get Grosby black shoes (or something similar) from BigW or Target. These then last for the year or until they grow out of them.
The wear jogger most of the time so I go to the DFO and get them on sale. This year DD10 is in Fila and they have lasted all year so far and still look great. DD7 is in Asics (or Adidas) and hers look fine as well.
I used to get their joggers from BigW but they were not lasting. I found that if I paid more and got a good pair they would last until they grew out of them. Going to the DFO it means I get $120 shoes for about $50-$60 so I am more than happy with that.