iPhone 3GS 16 gb white mint condition !

iphone 3gs 16gb minto condition wont turn on - run out of charge one day and when i went to charge by little baby up he wouldnt switch on. Cbb getting him fixed or trying to figure out whats wrong as i got a new phone. Screen and casing are in perfect condition as i was constantly cleaning them (little bit of Apple OCD). Could probably be used as spares/parts. Thanks