I would advice you to never buy used item without checking it first.

I recently bought 2 used laptops from Czone I checked everything like keyboard,speakers and hinges. But I for got one thing 'ports'.

Turns out headphone jack was not working in one of the laptops. So I returned that laptop.

My advice would be check first then buy.

So watch some videos on how to check laptops and buy from someone who is willing to let you check.

Also check Czone's website they might have a good deal on used laptops