No one revolver, no one size, no one answer.
Yes
Depends on the model and condition.
$400
Wall hanger to multiple thousands depending on exact configuration, age, overall condition, box, papers, accessories, etc..
about 1883
1877
50-375 usd
about 1907
50-225 usd
50-500 usd
2k What is this value based on
made about 1929