Some antique shops seem to price cameras according to age, condition, and complexity. A 1920's Box Brownie may be priced higher than a 1950's rangefinder because it's older. The 1950's rangefinder has more settings and adjustments, so it would be more than a 1950's Brownie. A clean shiny camera that uses an obsolete film could be more than a 35mm that has some wear. A camera that seems to be locked up could be a bargain because they don't know the correct sequence to set the shutter or it may need an obsolete battery. Prices seem to be more realistic lately with more dealers checking the internet, but sometimes you still find a bargain.