terve'u lujvo

x1 is a buyer purchasing goods x2 from seller x3 for amount/cost/expense x4.

Made from te + vecnu. Short form: erve

In notes:

vecnu
x1 [seller] sells/vends x2 [goods/service/commodity] to buyer x3 for amount/cost/expense x4.
erve
x1 buys x2 from x3 for price x4