The lee valley dividers from France are actually very good for the price at around $25. I would recommend those over the $10 or $15 dividers (new) - they will last you forever and serve you well. Now if you really want to trade in your first born son, you can get crucible dividers, over $100. In my opinion way over the top and unnecessary.
On ebay you will often find vintage dividers for very cheap, but they usually come as a lot with other small tools. Nothing wrong with those either.