Light Aircraft Association

I always enjoy a fly in but the costs I've been quoted for some this year are getting out of hand. I have a classic aircraft which they want in the static display but I've had quotes of £22 per person, £15 per person and at the other end Sywell at a fiver per aircraft.
What do people think. is the the Glastonbury effect? Started at a quid, now £200!

Surely if your aircraft has been invited to a static display, you incur no costs, save for the Avgas and your own personal refuelling?