Decided to have a quick look to see what ticket prices were at other clubs after the surprise of the cost of a Peterborough ticket. Here's the prices for an adult ticket bought on a matchday. Away price only where possible.
Wigan Athletic - CAT A £30, CAT B £27, CAT C £24, CAT D £22
Peterborough United - CAT A £28, CAT B £26
Rotherham United - Website a bit vague. £25-£27 in home areas for Charlton game.
Blackburn Rovers - CAT A £26, CAT B £24, CAT C £22
Scunthorpe United - CAT A £26, CAT B £25
Bradford City - £25
Portsmouth - £25
Southend United - £25
AFC Wimbledon - Away terrace £17 Away seating £24
Fleetwood Town - Away terrace £22, Away seating £24
Northampton Town - £24
Oxford United - £24
Plymouth Argyle - Not listed (but £23)
Blackpool - £22
Doncaster Rovers - CAT A £22, CAT B £21
Rochdale - £22
Shrewsbury Town -CAT A £22, CAT B £20
Bristol Rovers - Away terrace £18, Away seating £21
Bury - £20
Charlton Athletic - Not listed
Gillingham - Not listed
Milton Keynes - Not listed
Oldham Athletic - Not listed
Walsall - Not listed
Wigan Athletic - CAT A £30, CAT B £27, CAT C £24, CAT D £22
Peterborough United - CAT A £28, CAT B £26
Rotherham United - Website a bit vague. £25-£27 in home areas for Charlton game.
Blackburn Rovers - CAT A £26, CAT B £24, CAT C £22
Scunthorpe United - CAT A £26, CAT B £25
Bradford City - £25
Portsmouth - £25
Southend United - £25
AFC Wimbledon - Away terrace £17 Away seating £24
Fleetwood Town - Away terrace £22, Away seating £24
Northampton Town - £24
Oxford United - £24
Plymouth Argyle - Not listed (but £23)
Blackpool - £22
Doncaster Rovers - CAT A £22, CAT B £21
Rochdale - £22
Shrewsbury Town -CAT A £22, CAT B £20
Bristol Rovers - Away terrace £18, Away seating £21
Bury - £20
Charlton Athletic - Not listed
Gillingham - Not listed
Milton Keynes - Not listed
Oldham Athletic - Not listed
Walsall - Not listed