I agree with 2 dogs the days of 300 dollar bisleys has passed us by. Your not going to find a good one for under 400 bucks anymore.
The Bisley vaqueros no, your right, they'll be up over that $400 mark usually. I have found and bought two regular Bisley's this yer that were under both tagged at $350. One in .357, the other .41 magnum. Neither had boxes but were in 95% condition. I still think they have another .357 one for under $400. Just gotta know where to go and be lucky when you go there.
Just as a comparison, I got my consec #ed .357 Acusports for under $900/pr. and a couple other Acusport models for under $425.