The bill is £391, works out at less than £100 each. Not bad I don't think
Two ways to look at it.
Value for money - for £100, best part of a week's camping, a motor race and whatever the hospitality gets you is very reasonable, and I'd pay it.
Rip off - because we know the face values.
However to my knowledge you cannot buy any major concert tickets without a surcharge of some kind (Ticketmaster charged nearly £3 a ticket for my Christmas panto tickets - Oh no they didn't - Oh yes they did). These people are in it to make money.
The peace of mind mentioned above can be priceless, and if I wasn't one of the lucky ones on the repat list I would be booking through JT too.