My Brother QL-500 label printer worked so nicely I bought a second. I took a gamble and bought a used one from Amazon Marketplace and failed.
See the lines in print out; in lines 2 and 3 and little in 1?
I tried the cleaning sheet but they didn’t help.
I contacted the reseller and they refund my money and didn’t make me send it back to them. It took 2 daysish to respond to my email.
All in all I’d try buying used again.
I’m a fan of the Amazon Marketplace