Where can I buy a straight wooden board to make a straight edge?

Update: Where can I buy a straight wooden board to make a straight edge? I have started wood working with some little projects, but I would like to rip a long board straight. A table saw is too much for my hobby budget, but I have been looking online. If I had a straight board I could then glue/screw it to a junk board.... show more Where can I buy a straight wooden board to make a straight edge?

I have started wood working with some little projects, but I would like to rip a long board straight. A table saw is too much for my hobby budget, but I have been looking online. If I had a straight board I could then glue/screw it to a junk board. Then, run the saw down both sides ... instant straight edge. However, I need a straight board to start with ....

What can I buy at Lowes/HD that would be a good straight board?
Update 2: I found something cheap that isnt 100 dollars ... go figure I find it right after the post.

https://www.homedepot.com/p/Empire-98-in...
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