I bought one last week from Summit, they beat the price at SD by $1. Only went through Summit because I was already placing a very large order with them, otherwise I would have gone through SD, it's free shipping as well.
I didn't price check anything else, but I have bought a lot of what's on your list, and I know I paid less for a few of the items. But the sway bar was the only one fresh in my mind of where the better price was.