2 oz. bottle of Americana paint, for $0.50, plus possible rebate

Joann's has got these 2 oz. bottles of Americana acrylic paint on sale for $0.50.  Shipping is free when you enter promo code PHZG002 at checkout.

That's a great buy, but there is also a mail-in rebate out:  buy 5 bottles, get $3.00 back.  The catch on the rebate is that it says that it's for purchases at a Joann's store (doesn't mention online).   Also rebates usually don't knowingly refund more than the purchase price, so I'm guessing this would be rejected.  I would try buying 6 of these bottles, which would at least bring the total up to $3.00, the amount of the rebate, and then submitting the rebate.  It's worth a shot.