I bought some 75cl bottles in Drie Fonteinen in September. The standard Oud Gueuze was EUR4.50, the Schaarbeek Kriek was EUR9 and I can't really remember what the 2003 vintage Gueze was for some reason (cognitive dissonance about the price?) - it might have been EUR17.
That 4.50 Gueuze retails for 12.99 (I think) in Redmonds in Ranelagh, so I dread to think what the Kriek or the vintage would be if imported here.