Yes... stock one is almost priced that only. As Johny mentioned of Joel, it would be good option but the decibel level is too high. Police thse days are very pro-active in taking action against these type of exhaust system. Also, I don't think Joel would just fit the exhaust. There are other of modifications which he will perform too so the cost may shoot above the normal exhast cost. Your take.
brother, the stock one is priced like that only...another option is Free Flow Exhaust...which is good, if the fitting is proper...one authentic source of this is Joel...he is the man behind tricked-up bikes and is very reliable in work. You can check out his own online store, "raceconcepts.com"...Mind if I ask, what problem are u facing with your exhaust?
Clutch plate and starter clutch are to be changed only if it shows the signs of wear, and its life differs based on riding conditions and the rider. You don't have to change them on periodic basis.