If only for the sheer devilment of it, I'm going to jump in on Nikos's side...
😛
There are a lot of people who play the "I don't really know what this is" game on eBay and good on Nikos for drawing attention to one example. In the UK, if you sell something by way of trade you must have sufficient knowledge and skill to describe it accurately and be sure it is fit for purpose. Weasel phrases like "I don't know much about this" are no defence. Indeed, they're taken to exacerbate the offence.
I personally know of one case where a "trader" tried this trick in England. He ended up having to make a full refund, plus costs and damages and paid a £1000 fine on top.
Just sometimes, the bad guys get their comeuppance! 😀