Dazadi via Amazon [amazon.com]
has their Aqua Marina Beginner Inflatable Stand-up Paddle Board
when you 'clip' the $100 off Coupon found on the product page. Shipping is free.
Link to Deal [amazon.com]
Other boards look to be around the $200 range so if you are eligible for the coupon this seems like a very good price.
Note, You must be signed into your Amazon account in order to "clip" the coupon. Coupons are typically one per account and may not be available to everyone.