for me, last time i did it for SGD600 (convert to RM around 1200-1300) when i was back in brunei and it was in the general hospital, if i remember correctly, age doesn't seemed to be the factor...

i had my braces on for 2 years, then i used retainers for another year before i took them all out completely...

if all your milk teeth had already fall off and u have a complete set of pernament teeth, then it's the right time to go for braces...