[POMPONIUS libro nono ad Sabinum. ] §18.2.15.prSi praedio in diem addicto ante diem uenditor mortuus sit, siue post diem heres ei exsistat siue omnino non exsistat, priori praedium emptum est, quia melior condicio allata, quae domino placeat, intellegi non potest, cum is qui uendat non exsistat: quod si intra diem adiectionis heres existat, melior condicio ei adferri potest.
[POMPONIUS, On Sabinus, book 9.] If, when an estate has been adjudged subject to a better offer by a certain day, the seller dies before that day, whether an heir to him appears after that day or does not appear at all, the estate is purchased for the prior buyer, because a better condition offered, which would please the owner, cannot be understood to exist when he who should sell does not exist; but if an heir appears within the day for a further offer, a better condition can be brought to him.
§18.2.15.1Si fundus in diem addictus fuerit pluris, ut quaedam ei accedant, quae non accesserint priori emptori, si non minoris sint hae res, quam quo pluris postea fundus uenierit, prior uenditio ualet, quasi melior condicio allata non sit: si minoris sint.
If a plot of land was adjudged at a higher price subject to a better offer, on the terms that certain things are added to it which had not been added for the prior buyer, if these things are not of less value than the excess amount for which the land was afterwards sold, the prior sale remains valid, as if a better condition had not been brought; if they are of less value, [the prior sale is dissolved].
idemque aestimandum est, si dies longior pretii soluendi data fuerit, ut quaeratur, quantum ex usura eius temporis capi potuerit.
And the same estimation must be made if a longer period for paying the price has been given, so that it is investigated how much could have been gained from the interest during that time.