If I ballot for tickets myself, they're usually around $70USD, but you need to be a member the fanclubs to do this.

For this concert I paid $70, buying it on tickets.co.jp but more times than not, they can cost anywhere from $150-$500. See why I jumped on the $70? ^^; There are people who wait to see what seats the tickets are for, but I'm ok with buying it cheaper and just seeing what I get.

hope that helps a little. ^-^