I like this idea and I hope we end up with a comprehensive list. That said I don't think one should base your purchasing amounts based on the MRSP due inflation and of course the numbers currently being circulated in the market.
Like you I am a new collector too and started last year and was on ebay daily looking for retired models. Along the way I built a Matrix because I missed some models and had to wait for months before they appeared again and did not want to miss again. Hopefully this information will help you as well. FYI this was as of end of 2015 and the picture might be slightly different now. This list also excluded anniversary and special editions.
Extremely rare... (never seen one for sale)
Juice SX(Original) 2013-2013
Very rare... (appears once in 2-3 months or so)
PST(Early 80s) 1983-1986
Hybrid 2006-2010
Vista 2006-2010
Genus 2007-2010
Rare... (appears once a month or so)
PST(Japanese) 1985-1988
Flair 1999-2004
Sideclip 1998-2004
Juice Pro 2002-2003
Juice KF4 2001-2005
Juice SC2 2003-2005
Soon to be rare... (only a few listings)
Mini Tool 1986-2004
Supertool 1994-2001
PST II 1996-2004
Pulse 2000-2004
Supertool 200 2001-2005
Charge Xti 2004-2007
Squirt E4 2003-2010
Freestyle CX 2009-2011
Juice XE6(Original) 2001-2014
Sorry, I do not have any MRSP information to add to your list. This is my contribution to your thread
