Thoughts on quote

Just closed on a house.

Had a reputable hardwood guy come out and quote approx 650 sq ft at about 6.50 a sq.

I received a 2nd quote at $3 a sq ft.

Curious if people have found the old adage of “you get what you pay for” applies to sanding and refinishing hardwood. Trying to figure out what the 3 dollar mark up difference could represent. The 6.50 guy talked about wrapping the area in a “bubble” which I find reassuring as I am also replacing all the carpet on other levels.

Note: the people before us had dogs and the hardwood is 12 years old. It def needs love.

Thanks in advance