I have bought it for £22 from Amazon. Much cheaper than anywhere else online. Cheaper than renewal also. Posting as may be of use to others. Decided that despite some flaws, because it is light on the system, I am sticking with it.
How is it cheaper? I found it here http://www.amazon.com/Navarre-ESSH-..._1_1?ie=UTF8&s=software&qid=1281819935&sr=8-1 and it's the same price as you would find it online in eset.com.
OP stated £22, so you might have to look at the UK amazon site. http://www.amazon.co.uk/ESET-Smart-Security-Year-User/dp/B003FZBWKY/ref=pd_cp_sw_h__1
I also ordered two times a 3-user license for 22 £ at Amazon.co.uk. Have more then 3 computers at home. The local ESET distributor here in Sweden want about 200 EUR for a 5-user Business license. A 3-user Home license of ESS costs still 100 EUR. So even here i would have needed to buy two of them for about 200 EUR. So for the same money I get 3x 3-user licenses for ESS at Amazon.co.uk. Strange that there is such a big different in the pricing.