The NFL Europe shop currently has a sale on.
There are some decent deals in there, especially if you want to pick up a memento of the 2016 London series.
Bengals/Colts/Jags/Giants/Rams 2016 T-shirts from £4.50
Team caps from £6
New Era team shirt from £10
Hoodie's from £10.50
I highly recommend the Nike "Sideline Fleece Hoodie", even if you are not an NFL fan and are just looking for a warm/comfy hoody!http://europe.nflshop.com/stores/nfl/en/product/chicago-bears-sideline-ko-fleece-hoodie---mens/193980
I think you can also get 15% off your first order by signing up to the mailing list.