...I could limit my search to Maltese sellers.
I would be interested to know how you did that!
The new Robbers Feast add on for instance - lots of people will want it for the tree. At Klickywelt Playmo-Family added up the individual parts cost as 17,94 Euros for just the tree compared to 39,99 Euros for the set as a whole.
I worked it out as 18,45 Euro
recently, but I did it in £ on Playmobil.co.uk, then converted the total into Euro. The Playmobil.de prices may be slightly different.
On a couple of occasions when I have worked out the cost of buying all the parts to make up a set, the total has been quite eye-watering. For example, to get all the parts new from DS to make a 7337 to extend the 3965 Modern House came to over £80.00! And some of the wall parts were not available, so that would have pushed the price even higher. A 3965 plus 7337 can be got on eBay for around £80, admittedly not brand new.
I have
ranted before about the cost of some DS parts and I think Geobra more than cover their costs in running the parts department of DS. At a guess, I would say that DS parts probably cost on average three times their equivalent when bought in sets, though this varies depending on the part in question. That puts eBay prices into context!