So for the cost of watching Fulham or Neil Sedaka I can attend 9 EA district events - not really a hard call is it.
I don't think 9 EA District events would tempt many people . . . hardly the highest quality of orienteering is it?! (and that is not saying anything about the standard of events provided by EA - they're always excellent, it's just a shame there aren't areas to match.)
On the main topic - £13 does sound like quite a lot but as was said before if BOC turns out to be the pinnacle of UK orienteering in 2006 then it'll be worth it.