honestly, I don't mind these expensive apps...
the market will take care of this..
If someone is dumb enough to think an app could be worth $499 and they have the cash/credit to buy it, good on them..
If no one purchases this app, the developer will have spent the $99 for nothing.
But if even one person buys it, then the developer has recouped that fee.. pretty much win/win!
I say charities should do this, create a shell developer account, and put out an app for $500 or more... even if only 5 people purchase the app, that's about $1500+ the charity didn't have before... Fundraising via Stupidity!
And as Microsoft points out...all sales are final, so there is no risk of any charge backs!