Yes,Humayan- I sort off figured that-it's all new to me,no issue with that,simply just looking around and seeing what sort of prices one can buy items for.It pays to do a bit of homework.And the advice here from IIS members is very good and helpful.
Some have taken a fair bit of time to get knowledge,and they are helpful to teach what they have learnt.
'Chris9mu' had the best advice-do not go on ebay,unless one knows exactly what one is looking for-otherwise one ends up buying all sorts of things!
Thanks again everyone for advice and pointers
Chris