you can answer it yourself by looking for 2001-2006 E46 M3's for sale on autotrader.com and cars.com, dime a dozen, and I don't expect any different. Two generations removed and most cars would have been scrapped.
this is a standard issue sports car, not an allmightyomfgbbqwtfpwndiowntheworldthebestcarinthe worldsuperman car.
If you do get this car, you need to start worrying about maintenance cost. Can you afford the cost of tires, diff and transmission fluid changes, spark plug changes, etc?