Venus we have that all the time over here too.
Actually our Cricket Association got stuck into scalpers (cricket over here is like baseball over there - our summer sport). We were playing the "Old Foe" England, and tickets were going to be hard to get - so they decided that any tickets that were sold on ebay etc (ticket numbers would be noted) would not be honoured at the gate. So the warning went out that they would prosecute those selling and not honour the tickets sold (to discourage people wasting their money). It took a while but people caught on pretty quick - no buyers ( 'cause they'd lose their money) meant scalpers were far less and the average punter could get a better chance at the tickets.
If I were you I would vent my spleen a little at Hannah's management (her Daddy) and suggest that they could be one of the first in the country to do something positive for working families. After all it doesn't benefit the performer or the person genuinely wanting the tickets. If they advertised that they would monitor ebay etc and not honour those tickets then the scalpers would learn that if they were serious they would have to get out of their loungeroom and travel to Michigan to make their money by selling in person. It won't stamp it out completely but might help.
And I agree a bit with airscapes that you have $500 you were willing to spend on the concert that you can spend on merchandise - a better CD player that they can Karaoke on, and some of her CD's - Hannah wigs or whatever is the flavour of the month. If they can't go they can get to feel like Hannah.
I have to say that that girl is well marketed.
Children are resillient - they'll survive but I'd tell them that Santa is trying to fight the evil elves who left the workshop & became scalpers

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