Exactly as Bonnie says Eddy..
Nobody sells their childhood toys here in greece. If a parent is not sensitive enough to save them at a warehouse or an attic etc, they are thrown away, given away to less fortunate kids, or just distroyed while playing. We have no garage sales here or car boot sales, as nodody is interested in buying something second hand. Kinda considered as an embarrassment actually...
I have difficulty convincing relatives and close friends to give me their playmobil, not because they want to keep it and maybe sell them, but because they are bored to go looking for them. Although some people say to me, ''Playmobil? Grow up man! It would be nice to have them now though, I know they can sell good on the internet...''
All these people don't have the sensitivity of a collector...boxes are not kept, they are thrown away, the toys inside the box is important for the kid.
Playmobil Hellas does not allow toystores to keep big cardboard displays, large klickies are turned back, even broken ones for recycling, front displays might end up to relatives of the toyshop owners but are usually turned back to Playmobil Hellas. No toy shop owner dares to help someone who wants to get the cardboards or the displays as Playmobil Hellas will be reluctant to conduct business with them again... Very strict rules.
Its nearly impossible to find an old toystore that keeps stock (playmobil is the toy that sells the most here), and even if they do, the prices would be just as high... I found a 3665 and 3667, both misb, at a small town a few weeks back and got them for 150 euros. They certainly cost less than these sets in ebay but this was a chance out of a hundred... And if you ask them if they know someone who knows someone, that someone will ask a fortune to give you the misb set...
I don't know how you do it, but If you have any suggestions Eddy, I'd welcome them