MacBook that works fine but sometimes black screen appear
Not sure if this topic is appropriate here, I have a MacBook (retina, 12" early 2015) model that works fine but sometimes black screen appears while the macbook is running (even if I attach it to an external monitor). I bought it about 1.5 years ago and it is already out of warranty and so I didn't bother bring it to apple for repair. I am not a tech savy person, have no idea how to fix it and thinking to just let it go by selling the parts or the whole macbook because it is still working fine. How do you think I should go about selling this laptop and how much would people recommend?
Here are the specs for the macbook.
512 GB PCle-based onboard flash storage
1.2GHz dual-core, Intel core M5 processor Turbo Boost up to 2.7GHz
Intel HD Graphics 515
Battery less than 50 counts and with normal condition
With minor cosmetic defects (dents on the edges)
LCD display working fine with no issue
Trackpad and keyboard clean and working perfectly including backlights
Fans working smoothly
Thanks in advance and greatly appreciate if anyone could give me an advice on how to sell this laptop!
P.S not sure why my post got deleted. Thus a new post here.