IPhone :: 3GS Dirt/stone Stuck Inside Headphone Jack?

There's something stuck inside the 'clicky bit' at the bottom of my headphone jack, stopping the 3.5mm plug from clicking fully down into the phone, making the connection to the earbuds very delicate and making it impossible for me to listen to music properly without holding the phone still in my hand, one of my friends (''phone repair expert'') says its stuck inside a mechanism, and that it would require replacing the whole unit, including the silent switch (My silent switch is also broken but not a major concern)The phone was purchased on contract december 2010 so is of warranty, and is also jailbroken on 5.0.1 (I LIKE it that way, @oldwomanwhingers) so I expect the hardware warranty doesn't apply here, so any chance I could be given a vague estimate on what Apple would charge me for this repair?