x1 [seller] sells/vends x2 [goods/service/commodity] to buyer x3 for amount/cost/expense x4.
x1 is a salesperson/salesman/vendor; x3 buys x2 from x1 (= terve'u for reordered terms); x4 is the price of x2 to x3 (= velve'u for reordered terms); for sale (= fitselve'u, selvenfriti); x2 may be a specific object, a commodity (mass), an event, or a property; pedantically, for objects/commodities, this is sumti-raising from ownership of the object/commodity (= posyve'u, posyselve'u for unambiguous semantics). (cf. canja, dunda, janta, pleji, jerna, kargu, prali, zarci, vamji, jdima; see note at jdima on cost/price/value distinction, fepni, friti, jerna, rupnu)