If you want to go on the really cheap, I put these in my daughter's car and they are not too bad, although one of the rears did come apart, and my first set of fronts came with the wrong hardware. They did send replacement hardware when I told them about the issue. These are for a pair, and are probably as good as the Monroe's. For the prices you are talking you should get much better shocks.
Rears 
Fronts
John
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<a href='http://home.comcast.net/~adamsjohn/325ic/isabelle.htm' target='_blank'>1992 Cabrio 50k mi - Isabelle</a>
<a href='http://home.comcast.net/~adamsjohn/Otis/otislives.htm' target='_blank'>1989 325i 177k mi - Otis (Handed down to daughter)</a>
2001 Ford Taurus 63k mi - POS - Wife's car
