If you collect Pakistan stamps, I would love to hear from you!  While I am certainly not an "expert," I do have some fundamental knowlege about the stamps of Pakistan, and have quite several valuable resources (e.g. regarding local overprints of the King George stamps of India) as well as direct communication with knowledgable friends in Pakistan.

         From time to time I need to prune my collection.  While I sometimes sell directly to dealer friends in Pakistan,  most often I list items on ebay so that more people can have a chance to add to their stamps of Pakistan at a reasonable price. 

You can see what I have listed on ebay by entering my seller ID, which is BruceDHS, in the search box.

              I also will sell directly - let me know if you are looking for a particular item, and I will reply with scans and a price.