Without knowing which "this one" you are referring to...kinda hard to say.
Generally, there are two ways to get free shipping.
1.) The product qualifies for 'free flatpack shipping' which is always noted below the product title/header on the ad page.
And...
2.) Since you mention domestic, include this product in an order for at least $50.00 and you'll qualify for free shipping too.
There you go!