It can really depend on what it is and how much you are shipping. Sometimes I can save you money over Buyee, sometimes I can't. Shipping rates increased by about 35% within the last year more or less matching the devaluation of the yen. Where I can really save you money is when you have multiple items that need to be condensed. Buyee tends to just throw all your small boxes as is into a bigger box (usually TOO big, Amazon style) and call it a day, whereas I'll take everything out and try to get into as small of a package as possible while still being protected.
I'm booked up right now so I'm not taking on any new orders, but please keep an eye out on the first page and on my signature.