from what i have seen at gun shows and online, the 3 inch barrel 547 commands a higher price than the 4 inch barrel 547, despite the higher production numbers on the 3 inch.

i most recently saw a 3 inch offered for just over $2K and the 4 inch version around $1400. condition and accessories being equal.

i have seen a 3 inch 547 go for over $2.5K this year online.