Everything will be being sent tracked, unless it's a pin badge or single pack, style of thing. Peace of mind for all concerned. Euro costs will depend on weight of parcel, eg a single pin badge costs me £3.20 plus box price to post to Europe as it's over 5mm thick, despite it only weighing 30 grams or so. Tracking on that would push it up to £8.20 plus box. For bigger pledges, eg with NetherLords in, if a parcel is up around the 500gram mark, it'll be around £10.20 plus box for me to ship as it will have to go tracked. And so forth. It won't be prohibitive, and I would expect the max to be around £15.00 if you ordered say one of everything. Might even throw it in for free if you do that!
I think I'll probably be franking stuff by the time fulfilment comes around in February next year, so hopefully costs can be brought down by a bit. I understand franking to be 20% cheaper or so to the user. will be looking into it