Around Vegas it seems to be going about 250.00'ish up to 350.00 on craiglist (of course some of those low prices looks a little shady). Guess it depends on where you live.
Alot of people just don't know how good a N1 really is (I work outside @ McCarren airport and my N1 has survived the heat/sun/rain/cold and still keeps on ticking like I just got it yesterday (using Case-mate dual hard/soft cover).
Have had it since March of last year. Slowly looking for the next best thing (My Gal uses a samsung mythic and is eying my N1 when I get a new phone) but the Atrix seems to have let me down (We all get hyped up over new tech till we get our hand on it then it either lives up to its hype of falls to dust)
I am eying the Samsung S II (I think NFC is the next big thing for phones..and of course still make phone calls..heh).. yes yes I know the Samsung is DEAD last for update..but you never know things can change (HTC is just rehashing it stuff lately).
But for now my N1 is king.