Is it close enough to you to test drive? This way you can check stand over & how this size bike "feels" under you.
I'm 5'11" & have a 21 inch* 1993 520, although the frame is way small by the numbers, I got it comfortable for me.

*do note that Trek measured their frames differently than most others back then, I still have the sticker from the bike in my owners manual that says "Trek Specs 21"/53.5cm Frame"

~Roger

PS. I bought this one new, & in those days we were buying smaller frames for touring & pulling trailers.