You can never tell if you're gonna get charged or not. Marking as a <$60 gift works, but a lot of online stores don't do it ("It's unprofessional").
USPS does it for me though, only got charged once withem, and it was like 7% of what I paid.
The courier doesn't mark the item as gift for you......the store does when they fill out the custom form at the postal service.
Almost all stores I have contacted will mark it as a gift. "It's unprofessional" my ass. Everybody has to make a living. I tell them straight up "I am going to be purchasing $400 worth of merchandise from you. Can you mark it as gift and declare the value lower. If you fulfill my request, you can expect future business from me."
Trust me, it works =p