I thinking to buy an BMW 335i in (SHELLY BMW-Buena Park) end this month, What kind negotiation skill I must have?? and what is best to do in order to get ""INVOICE"" price?? and one more problem....my credit is ""very bad"" I know those dealership will use this to against me but how do I solve it??Here is my option so you will know the price around.6-SPEED STEPTRONIC AUTOMATIC TRANSMISSIONSPORT PKGPADDLE SHIFTERSCONFER REMOTEPRICE:INVOICE)39,820$PRICE:MSRP)42,950$W OW after week and 1/2 I feel I have ""spank"" by many people....true if my credit is 600-650 I think I'm out chance to see the BMW car... V_V anyone will suggestion for another bread to buy the car with credit I have now.PS::I really thank many people give me good point view to buy an car, but is silly that I think people did not think closely...If I already want buy BMW that mean...I already have $ to buythe car(makes me work hard 3 years) the total I can put in as down payment is around 20000$ I guess that won't be a problem when I then those money in my case(^_^;....O and one more thing..I'm not lesses but after buy one car I'm goner use for another 5-10 years(I hope I can keep that long). I hear some people tell me that maintainer is $_$ but come to think first 3 years with 50000 miles no cost might be better then Lexus or Infinity. and quality of BMW I believe it won't shout me down even after 5 years right guys??