I've been casually looking for a 610 for about a year, since I'm a a big fan of my 625's and 22-4's. I really like the moon clip loading, and N-frames in general are just SO COOL.....
The 610 prices seem really nuts to me, though. Virtually the same revolver in .45ACP (mod 625), same six-shot, same N-frame, same moon-clip loading, sells for several hundreds less. I've bought lightly used 625's for $625 - $725 from private sellers here in central NC.
Well, I shouldn't really complain, I don't mind so much when the guns I already own appreciate in value! I just wish S&W would start building the 610's again. The .40 S&W is such a popular round, I can't believe they don't have the 610 in production.
Lou