I do the same thing. enter your search, then push the refine key in the top right hand corner. then go to the bottom and turn on the completed listing button then .
I have the Mobile Ebay app on my iphone. I have tried the instructions you give to get to the Completed/Sold listings on my iphone — but there is no "filter" button .
How do you search completed listings on ebay app for android.
If you are on the mobile app search an item and then click on the "refine" tab in the top right corner.scroll down till you again see completed and sold listings .