Online purchasing

Is it despite the current economic climate or because of it, that there seems to be more and more online trading and less high street trading. We are now well-versed in the fact that anything from weight loss pills to new cars can be bought online, but we need to take some precautions in the online trading world.
We are far more susceptible to all sorts of fraud in online trading than we would be using more traditional methods, here is a short checklist:
Does the trader have a good track record?
Is the product offered, also available on the High Street?
Are transactions taking place on a secure server?
Do you have the physical address of the organisation you are dealing with?
Online trading can save you a lot of money as long as you are aware of the potential pitfalls, and as with any purchases, get lots of advice before you buy...