How much do you have to spend? Here would be my short-list at various prices:
<$500 = Ruger Mk2/3 or Buckmark
$500-$750 = Ruger Mk4, Buckmark, S&W 17
$750-$1000 = S&W 41. Hammerli 208, old Walther GSP, FAS602, High standard, etc are available and good guns but parts & support are non-existent.
$1000-$2000 = Don’t bother.
~$2000 = Used Pardini SP or GSP Expert. Be very careful.
>$2500 = Pardini SP or GSP Expert.
In all honesty, a good used Ruger Mk2 tgt should run you $325-$350. Best value of the bunch.