I don't think you could flip it and make any money on it. If you have a need for a truck pistol, tool box pistol, etc. I would expect it to serve you well. I have only shot a PPX once and that was a pretty long time ago but I don't remember feeling like I had to run out and buy one after putting a couple magazines through it.
When I have purchased a hand gun because it was a killer deal I have been ultimately dissapointed. I.e. $199 brand new Remington R51 immediately comes to mind.