Depends on what you want.
One of the things that I discovered is that a number of my more robust parents will not fit into chairs with arms. Easier to have it hanging over a bit.
I recently upgraded from chairs at Sam's club, nothing fancy but I believe I paid about $30.00 a chair for them. They are sturdy and functional but not fancy.
http://www.samsclub.com/sams/mgi-banquet-chair/prod3800005.ipI think you can find a lot of nice chairs in the price range you are looking. Just thought I'd throw these ideas out.
