Need advice on consolidating 2 items that arrive at the warehouse 1 month apart from each other
Last month, I ordered a fan-made keychain off Pixiv's Booth, and it arrived at Buyee's warehouse shortly.
However, a few months ago, I also preordered a soundtrack from Konami that is due to release on October 7th.
When I received notice that the keychain was in storage, the total bill for shipping was given to me as 4170 yen. "Pretty pricey for such a small item", I thought, so I decided I would rather consolidate it with the soundtrack in order to save money.
Except, the free storage period for the keychain expires on October 8th, and since the soundtrack hasn't been delivered, I have no idea how much they would ask for in order to ship it, either with the keychain or by itself.
I asked support, and they were not willing (or perhaps not able) to tell me. They advised me to ship them separately to avoid storage extension fees, but I don't believe it's necessarily the case that will turn out to cost more. After all, they only charge 100 yen per day of extra storage, and I can't imagine domestic shipping of the soundtrack will take more than a week.
I thought I should get a second opinion here. Has anyone had similar experiences balancing between shipping fees and storage fees, especially with smaller items?