The screen is only visible when the laptop is open approximately 20% or less (as shown in photos). Connection to an external display DOES work.
Great, not perfect, exterior with some scratches as shown in photos
battery condition "service recommended" with cycle count 256; here is what Apple's own website says about "service recommended ... Service Recommended: The battery's ability to hold charge is less than when it was new, or the battery isn't functioning normally. You can safely continue to use your Mac, but if your battery needs service or its lowered charging capacity is affecting your experience, get your battery evaluated at an Apple Store or Apple Authorized Service Provider, or contact Apple.

If you choose to use this machine at a desk always plugged in and connected to an external display, then it's 100% functional and you can get a great deal here!