okay im thinking about buying a mercedes. nothing brand new but im looking at either clk430, clk500, clk 55 amg

not sure which one but i guess it depends on a price..looking for like 2003+

anyone have any of these models? i drive my friends clk430 sometimes and i like them..plus the fact that i can get a 2004 clk500 or 55amg for under 30k i want one.

any input