"Kaufen": To buy or invest in. This emphasised the mutual transaction of cash versus a commodity in unambiguous terms (Okay, it can be used metaphorically as well in a similar vogue to English: "Das kauf' ich Dir nicht ab" = "I don't buy [=think] that"). Would you want to incorporate https://meineupdates.de/ein-einkaufsfuhrer-fur-massivholzbetten-worauf-sie-achten-und-wo-sie-einkaufen-sollten/