Wood is an excellent material for all standards of archers.  However, they can often become bowed which will affect your game. They are perfect for training though and they are also cheaper than some alternatives.

Here are some great wooden arrows on ebay

Traditional Blunt Points for 5 16 Wooden Arrows Sale Price: US $4.99

HUGE LOT 24 Vintage Wood Wooden Arrows ARCHERY Feathers Sale Price: US $135.00

Platinum Neptune Custom Wooden Arrows One Dozen Sale Price: US $79.99

Primative Wooden Arrows w Knapped Ubsidium Stone Heads Sale Price: US $31.95

wooden arrow blanks raw material Sale Price: US $30.00