Ok I set it to number and can now begin to see where I'm going but (ok theres always a but)
I used and for the first perameter and set it to be less or equal to ( going well!!!!)
then I looked for where to put in my variance figure ie a price of 5000 + or - 500
I assume it goes in the filter section but they are all greyed out.
so I changed the type box to value and my greyout boxes still stayed greyed out.
What am I mssing out?