This is my latest polybag acquisition: 30059, MTT. It cost me an arm and a leg to buy on BrickLink from a seller in Japan, which is the only place it's known to be available.
Now, excluding the 7 Shell sets that will be hitting UK shores any month now, I need just 6 polys in the 30xxx number range, one of which (30036) has only been sold once in the last 6 months on BrickLink so I guess there's little chance of getting it any time soon.
It got me thinking, why do many of us go to great lengths to buy and trade polybags? Often the sets are not that great, and this one certainly isn't worth the 30p per piece I paid for it. I have my own theories but I'd be interested to hear yours.
King of the polybag collectors among Brickset staff, atkinsar, will shortly be contributing regular articles about this aspect of the hobby so look out for his debut article in the coming days.