What length Jo staff is most popular for Aikido practice? Also, what to look for if looking at buying a metal sword? All around, to display, maybe practice some.. etc. Not a real high dollar one, something mid range.
Unless you are laying out big money, you can't get a metal sword that won't be a waste of your money. The lowest quality ones that are worth having are still very expensive.
You are much better off spending money on a really good bokuto. Forget the metal sword and invest a very good quality bokuto that will stand up to training. If you have display issues, you can display the wooden bokuto and jo on a sword stand. That will impress most people as much as a metal sword.