I buy a lot of Red oak, Poplar and Walnut. Also we now have a Specialty wood shop that carries about any kind of wood you want but its for a pretty price such as panuduk, Zebra wood -which I love!, Bloodwood, Aspen
And so forth. the list goes on Also I sometimes but old funiture at yard years if the wood is good or -lol I have been known to cruse to neighborhoods for other peoples trash.