Most times I buy enough to fit into their flat rate envelope which I think at the moment is about US$12.50 but as soon as it needs to go in a box you start paying a lot more. I ususally get things in about a week depending on the seller. So a week from when they send it.
Unfortunately for us some sellers add a fair amount extra for the inconvenience (oh sorry handing). As you can tell I have a bit of a problem with that.
Don't mind a $1 or so but sometimes it is $5 or more. I just got a parcel and was charged $7 more than it cost the seller to send to me. Isn't sending the item part of business.
Hipgirlclips is good as she works it out exactly and then sends you the cost plus about $3. Her prices are good so I don't mind.
Some sellers are really good and will send it not priority. Whatever that is called and it costs lots less. Their system is very confusing as they have all different types of postage.
Other than ribbon what were you looking to purchase. Maybe one of us knows somewhere to get the items here at a decent cost.
Sorry for the rambling.
HTH