Does seem a tad steep. Here's what the OS says:
Executive Boxes
Executive Boxes are available to entertain groups of up to 10 guests, and boast panoramic views over the pitch.
They have 10 superior balcony seats, an indoor banqueting table and are ideal for hosting a business function or private celebration. With a choice of catering packages, complimentary drinks and your own dedicated waiter or waitress, this inclusive package is perfect for either an informal buffet or fine dining occasion.
Watch the game from your very own balcony seats or even from inside through the clear doors, this package promises the ultimate viewing experience.
Choose your catering package:
Classic includes a 2-course buffet served in the Executive Box
Premier includes a 4-course plated meal waiter served
Then your matchday package includes:
Private facility to entertain up to 10 guests
Superior balcony seats
Classic or Premier package
Dedicated waiter or waitress
Complimentary bar
Matchday programme and car parking
Classic package £1300 (+VAT) per box
Classic seasonal (23 games) from £104 (+VAT) per person per game
Premier package £1400 (+VAT) per box
Premier seasonal (23 games) from £117 (+VAT) per person per game
All prices based on 10 people sharing one Executive Box.
http://www.saintsfc.co.uk/page/MatchdayHospitality/0,,10280~1656557,00.html