its nice to see that so many youngsters get support from their parents when buying expensive korean custom keyboards. I guess its better that they do "keyboards" then drugs
I've put in about $2500 over the past two years. All of that coming from money I've saved from Christmas/birthdays/pocketmoney, and from money I've earned from work/CAD stuff. It's easy enough when there's nothing else you need to put money into.
My parents have certainly never given me money to spend on keyboards, but it's possible to build up a substantial collection so long as you spend time searching for things at good prices. I'd say mine's worth about $10,000 at the moment.