Production enterprises may themselves establish sales outlets in the market, or may appoint someone on a commission basis, or buy and sell by mail.

生产企业可以在场内设点自销，也可以委托代销或函购函销；

youdao

I also got an E-mail from Duke Bush (who, by the way, is amazingly competent on the keyboard despite his lack of opposing thumbs) offering to sell me his secret bean recipe.

我收到一封来自布什公爵的电邮(这公爵大拇指都残了，但打字一点问题都没有)，向我兜售他的神秘配方。

youdao

Given where nose hairs fall in the spectrum of the potentially embarrassing products necessitated by frankly being a human being, what else can we sell this person by mail?

FORBES: A Perfect Business Model: Nose Hair Trimmers

But, by 1988, a U.S. District Court ruled that the phone providers could sell voice mail, as long as they did not manufacture the voice-mail products themselves.

FORBES