I've got some fifteen 7" records (both singles and EPs) from Spain, most of them first editions, and a few less from the rest of the world, apart from a couple of new releases (like the anniversary edition of 'Love Me Do' or the four 2011 Record Store Day singles). I don't think any of them is specially rare, but my favourite one is the German release of 'Sie liebt dich' b/w 'Komm, gib mir deine Hand'. To me, the coolest to collect are those with the cooler sleeves. Anyway, I use this
as a general guide, although I have more specific books for certain countries, just to know a bit about what I'm buying.