I'm not all that skilled in sounds creation but for a cheap price I can create custom 'sounds' for most computing needs i.e flash sounds, button clicks etc. My range is at the moment unknown however I have more equipment available to me than the average person -Mics, recording software, mixing desk and the like. Price will vary depending on what specificily you need but it will all be cheap. No more than $5 a sound, $1 for small files like a simple button rollover sound. Price can definitely be negotiated and you can test out sounds before you pay. Don't do music though.