User Activity

I can see as my items are sold ebay add the fvf. As I sell a lot of items and combine the postage for multiple buys I am worried about how this is charged. Why am I charged fees before I send invoices ? how do ebay know how much postage I am charging...
Quick question.. Who determines what is regarded as "Collectable"? . Are there certain guidelines?
I will make this short. I have had a buyer return some items they bought (BIN) because they said it was NAD. Obviously there is no point in my disagreeing with her as PayPal will refund her . My problem is she has unpacked all three items (all the sa...