If you are a Prime user then logout of Amazon and go look for that same item again. If the item is sold/shipped by Amazon then you might not find a big difference, but if the item is sold/shipped by a different company then you will see that the price is lower, but you have to pay shipping.

Resellers in the Amazon site have to up their prices to account for the free shipping, but I find that the upped price is still a bit cheaper than paying for the shipping separate.