Should I buy this used Medela Sonata pump?

Whitney

I found a used Medela Sonata for $50 and it comes with everything it normally comes with on the website. The only issue the seller says it has is that it has to stay plugged in to work. Not a huge deal. She used it for 8 months. I’ve looked on the website and apparently you can try to reset it and get it to work but there’s a chance it won’t and it will still need plugged in to operate. Should I get it?