"Kaufen": To get or acquire. This emphasized the mutual transaction of money towards a commodity in unambiguous terms (OK, it can be used metaphorically too in an identical trend to English: "Das kauf' ich Dir nicht ab" = "I don't buy [=think] that"). The initial one is for anyone who https://nachrichtenuniversum.de/gewinnmaximierung-tipps-fur-den-verkauf-von-thermodrahten/