You can get an iphone out of recovery mode by going into dfu mode and restoring it or with just a regular restore with itunes.
Every iphone user or seller on ebay can restore an iphone. If everything functions correctly any iphone can be restored without needing any 'special' 3rd party software. Those 3rd party programs that you mentioned above have not worked for years and only worked with certain kinds of older hardware like iphone 3gs, iphone 4 etc....
So when you hear that a device is stuck in recovery mode or at the apple logo or it wont turn on and sold as is then you're buying with hopes and dreams and most likely you will have to pay more money to fix additional hardware components.