What does -러가요 mean?

what does -러가요 mean?

I’ve updated the lesson text and added a space to make this more clear. Here’s the grammatical form being used: Korean Grammatical Forms

사러가요 should be written 사러 가요. 가요 is simply a polite form of the action ending of 가다, meaning “go” or “depart”. 사러 is 사다 (buy) + 러 (verb inflection indicating purpose). So 사러 가요 means “going/go (somewhere) to buy (sth)”. One must not lump 러가요 as one unit since some other word can as easily come after 사러, like 사러 와요 meaning “come/coming to buy”.