My hubby has an old guitar case that's been retired and sitting in a corner somewhere all but forgotton.......it would be cool to revamp it into something like this. That's for posting! It look fantastic.
I too think it's worth more than your $15. It's an awesome choice of fabric. I love the vintage look of it. I don't really know alot about pricing this sort of thing either but I do think you should charge more. Hey, you could always drop the price if it didn't sell, you could never raise the price if it didn't sell. I always enjoy seeing what you've posted as I think you have great ability to mix and match your fabrics and turn them into a something so darn lovely!
I adore it. I have a skirt very similiar to it that was a hand me down from my grandmother, yes I wear it! And I love the old womanish, hippiness of it the skirt and your tote! Good job and welcome! I'm addicted to this site!