I would feel confident when buying from him. With those pics it is plausible he does really have the decals. There is a phonenumber and he is near a lot of his audience (Almere-Amsterdam 10km or so). Around Christmas post is a bit slow and moreover post suffered from privatisation. Quality dropped, prices went up and respected postmen became slaves in marginal jobs the dogs don't like bread of. Staff comes and goes. You face your decals are slow, but overhere it became sort of common practice that I can expect Christmas cards coming in until summer - if I am lucky and they are not floating in a canal. I think in Germany you postponed this proces several times and maybe you should think over twice before really entering.