Hi Richard and welcome. This is due to number of each in stock. Same or similar higher stock firearms will be less $ than same or similar lower stock firearms and vice versa. Many more 3 inch in stock. Cheers and stay safe!

Hi Richard, the number in stock has nothing to do with the price. You're talking about $11, for God's sake.
From Bud's FAQ page - " Our website updates every 20 minutes, 24/7, with our current inventory and replacement cost. We do not price our guns manually based on our cost in each, rather we use a live download from manufacturers and distributors to set our price based on our current replacement cost. As our cost changes, the corresponding website price of each make/model will change up/down accordingly. Although our profit margin remains unchanged, our advertised prices will change frequently, sometimes several times per day."
Stay safe & have a great day!