This post is partially for my own personal use, so I can quickly look at the wood prices without having to make a trip to Home Depot. Both woods below are good for making longbows, crossbows and similar archery equipment.
I am currently working on a new crossbow, again using oak for both the crossbow stock and the bow limbs.
HOT TIP - Avoid buying wood planks with large knots in the wood. Check the wood for knots before purchasing and try and pick wood that has a nice even grain going down the length of the board. Also, never buy wood that hasn't been dried properly. The wood will split / break more easily if it still green.
I will also be posting a longer list of woods that are good for bow making in a different post in the near future. So feel free to Subscribe to Project Gridless and come back again later.