[ULPIANUS libro quadragensimo tertio ad edictum. ] §18.1.36.prCum in uenditione quis pretium rei ponit donationis causa non exacturus, non uidetur uendere.
[ULPIANUS libro quadragensimo tertio ad edictum.] When in a sale someone sets a price on a thing by way of gift, not intending to exact it, he is not deemed to sell.