Are the kits that you're selling "gift kits"?
This webpage says that they cannot be used more than 12 months after the purchase date. Would love to get one, if you can somehow show that the kits can still be used.
While the prepaid kits are indeed 'Gift' kits, I believe that applies to all kits 12 months past the purchase date. Some communication from 23andMe has led me to believe the kits may still be processed, but I can't guarantee anything. I suggest only parting with the 2 BTC if you're fine with that..