[Elecraft] Here we go ... stupid newbie questions ...

[Darwin, Keith]

Hey guys,
 
I've been QRT for several years and am getting back into the hobby.  I'm
interested in a K2 with only a few options (SSB, NB, 100, DSP).  Do I
need to get them all at once or can I build a basic radio and add the
options at a later time (I assume I can).
 
Can the 100 watt PA go into a separate enclosure and serve as a linear?
I think I've heard of folks combining the 100 watt PA and the 100 watt
ATU into a single box to make a nifty pair of base station boots.
 
How often do used K2 rigs come up for sale?  Do they usually fetch more
than kit price or less?
 
How does K2 compare to the TenTec Argonaut V?
 
73!
 
- Keith -