Gaea Miracle Direct via Amazon offers the Gaea Miracle 6-Piece Bath Bombs Gift Set for $14.99. Coupon code "GMBBMD30" cuts the price to $10.49. With free shipping for Prime members, that's the lowest price we could find by $7, although we saw it for a buck less in March. Deal ends June 1.

Update: The price has dropped to $11.99 before coupon, $8.39 after.