I’m in the US, so it might be a bit different, but I usually end up adding an item or two so I can hit the $25.00 free shipping thing (which is what they want people to do!).

I know on eBay, sellers will sometimes set a high shipping and a low bid/price to avoid paying final value fees – eBay’s supposed to crack down on it, but doesn’t seem to care much. They have pretty buyer friendly return policies though, so it’s hard to really scam a buyer (scamming sellers is another matter… grrrr…)