4.5k is just the buy it now if someone wants to end the auction early. The reserve price is much much lower. They certainly aren't inexpensive, that is for sure, but are quite rare and special.
2012 335i Sport, 6 Speed RWD
2006 330i Sport (sold) - 2002 330i Sport (sold) - 1996 Boston Green M3 (sold) - 1995 325is (sold) - 1973 2002 (sold)