All round sennheiser mic?

[versioncity1]

Hi. I use a DVX100ae and want to buy a seperate Gun/boom mic. I can't afford much so will be looking at the second hand market. I need it principly for documentary work (recording interviews & the like) Can anyone advise on what model(s) I should be looking for ?
Any links will also be appreciated.
Cheers.

 

[Oleg 2]

not much is very not much for sennheiser name , check the audio technical 40 73 , cheaper then sennheiser much better performers ,the akg blue line or used akg ck69(short) +460 or 480 preamp are also better choices .
of course if you find used sennheiser 416 ph 48 in reasonable price , this is my favor for everything