Katie, your signature says it's a '73S... did you verify it's an S with the VIN??
Not to assume you don't know this, but the numbers would have to read 911330XXXX if it's a real 73S coupe (decklid badges are meaningless). If the 5th digit is a 2 it's an E, a 1 is a T.
Could be a steal if it's a real S, and the rust is minor (which is unlikely if you can see it... usually means there's more where you can't see). My advice: don't get too attached until you get a PPI or have someone who knows early cars look at it. Could be a *REAL* money pit - we need pics and a VIN to give any opinions worth a flying fuch.
Would love to see you in a longhood though!!
PS - if it has a whale tail / tea tray - tell him to deduct $1k on the spot for principle alone!!