[ULPIANUS libro uicensimo octauo ad Sabinum. ] §18.2.9.prSabinus scribit licere uenditori meliorem condicionem oblatam abicere sequique primam quasi meliorem, et ita utimur.
[ULPIAN, On Sabinus, book 28.] Sabinus writes that the seller is permitted to reject an offered better condition and to follow the first as if it were better, and this is how we practice.
quid tamen, si hoc erat nominatim actum, ut liceret resilire emptori meliore condicione allata? dicendum erit dissolutam priorem emptionem, etiamsi uenditor sequentem non admittat.
However, what if it had been expressly agreed that the purchaser should be permitted to withdraw if a better condition were offered? It must be said that the prior sale is dissolved, even if the seller does not accept the subsequent term.