2FA Keys - Yubico etc. Who has experience?

I am looking at 2AF keys, and wondering which is better at a realistic price, considering I would need at least 2.
Trying to find a reputable seller of Yubico in the UK is a problem. I wouldn't trust eBay for this, and Amazon UK only has amazon US as a reasonably priced supplier. I could save at least 10% by dealing with the US, but what of guarantees, rights, etc.
Other manufacturers are available to buy here, inc Thetis. Almost all online reviews are for the yanks.
Just looking for personal, or business deployed experience.