Thank you both for the advice @
veganbikes and @
subgrade!! The x.y info is super helpful and thank you subgrade for finding and checking out the post -- that's the one! Okay, I think I might just pass on this bike. Seems like the price is too high regardless, and you're right that it seems a little suspicious.
I found one other Craigslist option I think I'm going to check out -- a 2008 Marin Muirwoods listed for $60, which really does seem like a fair price. Have heard great things about this line of bikes too! I figure even if it end up needing some TLC, it will still work out to be a great deal.
If that one doesn't work out, I do have a local bike shop that let me know they usually have a range of used bikes in the $250-$265 range, which seems fair considering it'll be road ready and they'll help fit me for it!
Appreciate all the advice! Thanks so much!!