Playmobil Figures duplicates - swappping? Selling

[hanbee]

DS2 has a craze for collecting the lucky dip playmobil figures but of course he gets the inevitable duplicates which he doesn't need.

My thought was to put them away for future party bags but then I started noticing people selling them on ebay for far more than they cost. I wouldn't buy one at more than the shop price so won't be doing that.

And then it occurred to me that it would be excellent to have some sort of duplicate swapping club where everyone covered their own postage but got the figures they wanted.

Or am I alone in this craziness?