Which one?

[yummy]

How do I go about finding the right treadmill for me? What things do I look for how much should I pay?

[Englishbird]

You should work out exactly what you want from it and if you have any limitations.  i.e. depending on how fit you are - do you want one that has an incline?

There are so many out there - have a look on ebay as that shows you a lot of different types and what they specifically do. they can range from �100 to �750 +

If money is not too much of an issue you'd probably be better going to a sports shop and asking their advice.