There are as many reasons to buy a bokken, or sword training weapon as there are people, possibly.

I intend to cover some of these reasons, and hopefuly aid in the selection of the right sword training practice weapon, or bokken.

If you are into collecting japanese martial arts gear, then the oak bokken that is sold very reasonably, here on Ebay and elsewhere, is just fine for display. It is intended only for display, or for Kata, or one person practice of use of a Japanese sword. These are not at all durable enough for two person contact practice, and are easily broken. However, if you want an inexpensive tool or display item, then you cannot beat one of these at $6 and up to $15.

If you intend to study some form of Japanese sword training, then start with the inexpensive oak bokken. If you find that you have a desire to someday use a real, live, sword, then you will find that most of the oak bokken weigh just 30 to 40% of what a real sword will weigh. I'd always prefer to train with something  in weight closer to what my end goal will be. For this there are many choices. There are many, many, exotic woods that make a great, more durable bokken, that is much closer to what a "real" sword will weigh, and give you the ability to have your first sword, not feel like a lead weight when you handle it. Many of these heavier woods are quite beautiful as well, an added plus. For an exotic wood bokken, you might pay $40, to $200 or more, depending on the wood. Check your needs, check your pocketbook, and pick apropriately. Spend a bit of time on the internet looking at different woods, compare hardness, bending strength, and weight. Compare this to to the oak bokken you own, and go from there.

These exotic woods, also make great display pieces as well, as most are far more dramatic on a stand, than the oak you might buy.

The most important thing is to spend, and get no more or less than you need. Do not buy an oak bokken for full contact, unless you plan to buy them by the case. This is a case where the price usually fits the demand on the weapon. More money, better weapon, Most of the time.

Hope this is helpful, Ray Stephens, Bokkendo Woodworks