I just went to garage sales, and looked on Kijiji.ca and UsedOttawa.com (closest area to where i'm from) for childrens sized furniture. At a garage sale I found an amazing solid wood table and chairs set for $5 (original owner must have paid at least $100) While they are great, I found that it was a bit high for my little ones. Next place I found was on one of the used sites, and found an old table and chair set from 30-40 years ago in pristine condition for free! The legs of the chairs and table are metal. The chairs are very sturdy, and lower for my little ones.

My nephews have the wooden IKEA table and chair set - Svala, and it suits their needs.

Good luck on your search!