If you're going to one game, get your tix where you want, and do it soon. The pats* game is only week 3, so I wouldn't expect the prices to come down too much.
Too many pats* fans are willing to make the trip. A high priced ticket at the Ralph is a bargain to just about any other fan, especially them.
I drive in from Utica. When the pats* come to town there is a lot of pats* traffic on the 90.