£40 for 2 Tickets for SLAMDUNK 2012 - GLASGOW - TUES 29th MAY ?

I have 2 tickets for the Slamdunk Concert on Tues 29th May 2012. The Line Up: Taking Back Sunday Motion City Soundtrack Say Anything Hit The Lights Cancer Bats Purchased for over £50 for both tickets - both tickets offered for £40.