I cannot offer an opinion on the pricing, but my 2016 F6B has over 20,000 miles on it with not a single problem. And there is room in North Carolina for another F6B!
Welcome to the forum. I have a 2015 F6B with about 50,000 miles and I am very satisfied with it. I have a friend with about 75,000 miles on his 2014 and he is also a big advocate of the F6B. Other than the brake recall the only issue he and I have in with him common is the crank position sensor. He has replaced his and I have had to disconnect the battery twice and reboot the ecm twice on mine. I think this is one of the most reliable bikes on the road and have no plans on replacing mine. If you are concerned about your wife's comfort you might consider a full Goldwing because of the backseat.
As for the price I have nothing to offer you other than the fact that the B is not holding its value very well and with the new Wing coming out that might have a further impact on their resale value.
Get one ASAP so you can start enjoying it. They are a great buy right now but why wait trying to get a lower price. If it is the color you want I think that is most important. I don't think what year it is matters much and the biggest difference is does it have cruise control (started in 15) and maybe a back rest (delux I think) and maybe that is not important to you. Someone has a matt grey 15 for sale on this board that looks good.
In my decades of riding, I've owned several dozens MC's. By far my '13 "B" is the best bike I've ever owned. Brought it used, almost 2 years ago. The previous owner had done a great job of installing some very nice farkles. I've changed & added a few things to "make it mine." It rides great & handles like a big sport bike, doesn't feel like a 800+ lb machine...... Never a single problem. Honda did their homework (as they always do) when they designed this bike. You won't regret buying one. = The bunch on this forum are very, very helpful. Welcome & good luck.