Robbie remarked in 050701 MMDigest:

 [ The cost of convention facilities rises as the supply is depleted.
 [ AMICA and MBSI must compete against corporations who are willing
 [ to pay high prices for the huge convention rooms at a big hotel
 [ or convention center.

Here in the UK, the Fair Organ Preservation Society prefer to hold
their conventions (Annual General Meetings) at the invitation of
organ owners who are fortunate enough to have the facilities available.

FOPS gives a donation to a nominated charity if there's no fee, but if
there is, it's usually around the $150 mark for the entire convention.
Members attend free, with or without an organ, but pay independently
for overnight accommodation and meals.

Regards,
John Page,
Membership Secretary, FOPS