Hi @Matthew.Xu
I really don’t know much about logistics, just that the private couriers like UPS, FedEx etc. will have higher handling charges than the national carriers (e.g. An Post in Ireland). I was hoping someone on the forum would know more. I just wanted to make you aware of the extra charges that we can incur when you choose your redistributor and courier.
Also any goods with a value of less than €22 (incl P&P) or gifts are exempt from VAT so the add-ons arriving later could be sent with marked as low value or marked as a gift. Technically gifts have to be from a private individual to a private individual.
Looking again at the list of stretch goal gifts only the eye-tracking looks like it would be later in the year. I assume the others could be included in the main package (headphones, eye frames, cooling fan should be relatively simple to have ready by ship date) to keep costs down for both you and backers. The wireless voucher and game content are digital. So if eye-tracking is sent directly as valued at e.g. $10 it’s OK.
Don’t forget that EU also has regulations for RoHS and WEEE for electronics.
RoHS is the CE mark (self-certified), WEEE can be covered by including the symbol on product packaging.
I hope that helps!
Mal