Bahco Argentina is a division of the Swedish company, but they have had factories here since the early 60s.
Black and Decker and Dewalt are decent international brands, pretty much everything you get here would be made in China.
I probably own 50 hand power tools in the US, and I stick with higher end stuff, but I have been metalworking for a living for 40 years, and so my standards are higher.
I have found used tools here to be run hard and put away wet, and, generally, overpriced. As a regular at the Pulgas for over a dozen years, it would not be my recommendation. There is one guy there who sells industrial and vintage tools- but not much in the way of hand tools. If you need a good vise, or machinists tools, he has those.
San Telmo feria has "polishers"- antiquarians that shine stuff up, but the prices are generally more than new.
Facebook Marketplace is always worth a look- its where people actually want to sell stuff now, cheap.
Larger tools are quite expensive used here- there is a good brand of argentine metal lathes, no longer made, called Turri, and they routinely sell used for 5 to 10 thousand US dollars. Same thing with quality Argentine drill presses or woodworking machines. I know a guy who makes very nice sliding table table saws, for example, and while they are a fraction of the cost of Italian or German ones, they are still several thousand dollars.