I work in sustainability and have done a lot of work in electronics. I think electronics reuse is fine on the consumer electronics. But once you get to this level of power output the risk associated with fault goes up and you are taking more risk by using used.

Power electronics especially tend to have a life span as well. They heat cycle a lot more than other electronics. If you are concerned about electronic waste, I get it. But the circular economy is a huge myth and honestly, electronics recycling is better than most other streams so long as you take it to an electronics waste recycler directly and not try to send it through a MuRF.

It’s it a lot more risk? Probably not. But is it more? Yes.

Is the wallbox a smart charger? I get wallbox and one other charger mixed up between the two. I read a story on the evse sub reddit where someone bought a smart charger from eBay. They got it installed and working but then the manufacturer remotely shut down or locked the charger from working saying it was stolen

I bought second hand off eBay 6 months ago. No issues so far

I bought a used Clipper Creek Level 2 box on eBay more than 5 years ago. It has worked reliably for me. I see no reason to buy a replacement.

FYI “Wallbox” with a capital “W” is a brand of EVSE/charger. Collectively they are referred to EVSE, level 2 or sometimes AC charger. I actually purchased a refurbished Wallbox Pulsar Plus and its been great for going on two years now. Saved a nice bit off the prices too. So yes you can purchased used. For me it was a little bit of piece of mind to get a refurb from the manufacturer.