וְאִם־גָּאֹ֤ל יִגְאַל֙ אֶת־הַשָּׂדֶ֔ה הַמַּקְדִּ֖ישׁ אֹת֑וֹ וְ֠יָסַף חֲמִשִׁ֧ית כֶּֽסֶף־עֶרְכְּךָ֛ עָלָ֖יו וְקָ֥ם לֽוֹ׃
און אױב אױסלײזן װיל אױסלײזן דאָס פֿעלד דער װאָס הײליקט עס, זאָל ער צולײגן דערצו אַ פינפֿטל פֿון דעם געלט פֿון דײַן שאַצונג, און עס זאָל זיך אָפּשטעלן בײַ אים.
Rashi
ואם גאל יגאל AND IF HE WILL IN ANY WAY REDEEM IT “he” means, the man who dedicated it; then he shall add a fifth part to this fixed price (not a fifth of the fifty shekels, but a fifth of the value determined by this calculation is to be added to that value).
Ibn Ezra
The vav in if he redeems here functions like the Arabic f . The verse is a continuation of the previous verses, since Scripture is primarily discussing valuation — in the case when the field is redeemed, and in the case when the field is not redeemed.