Not sure we are looking at the same thing, they were more expensive when I looked, and the no vat thing, that isn't true either as you will need to pay that to HMRC on import. If you don't, it's called tax evasion
Edit... Just looked and they were about about 15% more. Kits and such looked even more. But if you want to pay more from a source that doesn't get it from CND, where your clients can buy it, where you could be fined and jailed for not paying import tax and where you will either be paying for flammable shipping (or be responsible for illegal shipping) then it's your money and your call