So £38 plus £2 for registered postage.
I'd say that's a fair price.
Besides, it's not the selling of a camping pass at perhaps a few quid over face value, it's the prevention of buying tickets with the sole intention of making profit that's key.
I have to say though, looking closer at my ACO invoice, it says the 45 Euros is for a Beausejour ticket with a Houx Annex in reserve. Well the Houx Annex ticket turned up, and if that's listed as 38 Euros, then it's the ACO who's a little out of order 'cos I've not had a 7 Euro refund!