As per the terms of ebay a power seller should have a positve rating of 98% and that will be calculated on the basis of past month rating.But in a number of cases I found aberration.I am giving an example here, seller blowout.dealz2 got 393 positive,11 neutral and 19 negative rating in past month.Their overall rating(1 year) is 97.2%.Still they have a powerseller mark beside their name.If anybody has any idea about power seller criteria please write.