I hope you cleaned the hub
with an oily rag before packing it up
Good lord, no! There's a whole VM process dedicated to booking in CPE returns, as part of this there's a bloke who's job it is to unpack each hub, burnish it with a greasy rag, not quite removing the baked bean and nicotine stains (or blood, if it's being returned from London, Manchester or Nottingham). And then somebody else slings it in a new box and it gets shipped out to some lucky, lucky punter who hopefully won't spot that it's used goods, and equally hopefully won't sniff it or lick it*.
It'd be wrong to put his job at risk, and I'm appalled you'd even suggest this. It's a solid, honest job wiping soiled hubs all day every day, and in these harsh times he'll be grateful that this a job VM haven't been able to offshore. I have similar socially responsible thoughts about the jobs I'm protecting when I'm littering or graffiti-ing (much like Banksy does, I'm sure).
* Of course there's some people probably do sniff or lick the hub they're sent, and enjoy the mix of odours/flavours from beans, cigs, plastic and electronics. And maybe dried blood. As a man of the times, I'm fully accepting of such diverse behaviours, and if anybody reading this is thinking "I wonder what my Hub tastes like?" then I say go on, give it a try. But not too much at once, because if it works for you, you'll want something left to go back to rather than leaving it clean as new on your first tasting.