I know the RRP is a bit of a joke, but
30ml EDT (RRP: £19.20) = £6.95
75ml EDT (RRP: £30.37) = £10.95
There is a couple of other sizes (50ml and another 75ml), but these Sseem to only available from 'AMP' sellers.
No idea what the difference is between the two 75ml versions other than around £3.50.