I've been looking at a few 14-42, 14-45 and 14-140 panasonic lenses recently, all from 2nd hand stores and all three 14-42's I've seen have dust, one out of three 14-45's and one 14-140's (quite a bit) I've looked at have them. Initially I looked at the 14-45 and 14-140 at the same store and thought maybe they just didn't bother cleaning them but I checked at other stores as well and they were present in some lenses. I don't know how long they've been on display at the three different store's I've checked, some of them have dust on the inside of the lens caps (front and rear) which I was able to get rid of with a blower brush but the insides had dust ranging from one spec to two or three clear specs. The dust itself isn't such a problem, I've had dust on some of my canon and nikon lenses over the years and never had issues. I'm just wondering about these 4/3's lenses in general, I've never heard of them being prone to dust and I know they aren't supposed to be weatherproof or sealed. Also, would you consider getting a used one with dust on the inside or wait for a better example?