The easiest way to get an answer to your question is to check past sales listings of similar condition Merkel 47E's on Gunbroker and other websites. You are likely to find that the minimum bid price is somewhere near or above full-blown retail, so just isn't attracting any bidders at this time. That could change for a motivated buyer as hunting seasons get closer. I'd assume the Briley Choke Tubes are an aftermarket addition which will be attractive to some buyers, and a negative to others. The rather short 13 1/4" LOP is going to eliminate some potential buyers too. Negative feedback or crazy shipping costs could also be a factor, but that doesn't seem to be the case with this Merkel. The description seems to match what we see in the pics.
Good brand name guns in good condition with low or no reserves don't usually last long without getting attention on Gunbroker.
