Now there was no smith found throughout all the land of Israel; for the Philistines said, Lest the Hebrews make them swords or spears:
The word "now" at the head of this paragraph means that, after the raiders had completed their mission, the situation prevailed as outlined here.  The raiders either murdered or captured all of the smiths in Israel and instituted a schedule of very high prices for sharpening the agricultural tools of the Israelites.