I went to the office supply store for my chair. I am really short and needed a chair that wasn't to deep from the front to the back. I also wanted one that I could choose not to attach the arms. I paid about $40 for it and it is now worn out
I went by the thrift store the other day and found a padded rolling stool for $9.99 and a wooden rolling chair for $4.99! I like the stool, it makes me sit up straight. The wooden chair is just the right height and I found a gel seat pad at Office Depot that makes the chair comfy.