I've still got a couple Ariens mowers ,one has sat in the rain for many years so not a lot worth getting off that one except the plastic discharge port shroud ,which was why I got that one in the first place.
$70 to $100 gets you a new Arc Welder these days Mf but I see people giving them away for free as it's not worth the time to sell them for $20.
A swap meet or a market or Auction ,garage sale ,probably get one for $10.
I've seen a few thrown out at the side of the road ,but would only pick up the CIG ones ,that's also where I got a good gas/ gasless mig welder that nothing was wrong with it after a slight adjustment.
For starting out I would buy a $20 second hand CIGWELD or get one for free and I would never buy anything that says Ozito ,even if people give me new Ozito tools for free ,I'd probably say no, or use it a few times and throw it in the bin, all the Ozito tools I've had last about 2 hours and end up in the bin ,lucky I've never paid for Ozito but know a few people that have got a refund because the tools don't last half a day.