lets say you decide you have a series of comics books or dvds that you want to put on E-bay...  my advice is...   to put on the highest number from the series first...  

E.G. selling a collection of Batman Comic books  - put the higher number from the series on first.. that way  - if people want to buy and collect the series from you - they will (if they want to own the whole series..) have to buy the highest number from the series from you first.....  why is this important you might ask....  well that way - you don't (straight away.) have the first in the series of your item sold  - leaving you with all the parts after it -  (not many people jump on board a series if they havn't been on it from the beginning... Part One is the important one....

don't take my word for it...   try it.......    ;-)