וְאִם־גָּאֹ֤ל יִגְאַל֙ אֶת־הַשָּׂדֶ֔ה הַמַּקְדִּ֖ישׁ אֹת֑וֹ וְ֠יָסַף חֲמִשִׁ֧ית כֶּֽסֶף־עֶרְכְּךָ֛ עָלָ֖יו וְקָ֥ם לֽוֹ׃
將田地分別為聖的人若要贖回那田地，就要在你所估定的價銀上，再加五分之一，田地就仍歸他所有。
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.