I bought a pair of new Dunlop SP 3000A tyres via ebay last week, from a tyre dealer, for £135 (the pair). Stupidly, I forgot to ask beforehand what the date of manufacture was (stamped on the side). When they arrived, I couldn't believe it - the manufacture date was 13th week of 2003, almost exactly 7 years old. You're not supposed to fit tyres that were made more than 6 years ago, and personally I'd prefer them to be even newer than that.
I emailed the seller, telling him the tyres are sufficiently old to be deemed unsafe, and he replied saying that's rubbish, tyres are safe even if they're made 20 years ago and he wouldn't give a refund. The guy must have assumed I was some kind of sap, so I replied back stating that I didn't need him to agree with me, even if the tyres were fine (which they're not), I'm still entitled to a full refund, including the delivery charge I paid, because of the Distance Selling Regulations. I also pointed out that he's registered as a business seller on ebay, and if he flouts the DSR I'd report him to ebay and also PayPal. He replied saying that he'd refund the purchase price, but not the delivery fee.
I replied back saying I didn't need to negotiate with him, as the DSR is clearly on my side, and finally he agreed to give a full refund (including the delivery charge I'd paid him) if I returned the tyres to him.
The tyres have been sent back, he's now refunded my money, and put the two tyres back on sale, still not mentioning in the advert that they're 7 years old.
SO, moral of this story? Always ask the tyre seller when the tyres were manufactured - and don't believe him/her if they say "don't know".