Well ... Since you asked
I have an Excell Spread Sheet for this kind of stuff (a sure sign of a Compulsive Disorder).
My 'Watch' list [stuff I'm likely to buy, eventually] :
Pentax K-1 (pre-ordered 2/19/2016)
Pentax 645N
Pentax SMC-A* 600/5.6
Pentax SMC-K 18/3.5 (bought one August 2016
)
Pentax SMC-K 50/1.2
Sigma APO 500/4.5 MF
Pentax SMC-A*/FA* 85/1.4 (bought FA*85 July 2016
)
My 'Wish' list [not likely to buy, but who knows]:
Pentax MZ-S Champagne Gold (I did get a Silver one recently)
Pentax K2DMD chrome model (I've seen a picture of one!)
Pentax SMC-K 15/3.5
Pentax SMC-F* 250-600
Recently full-filled Watch/Wish items :
Asahiflex-I
SMC Pentax K28/2
Tamron 63B 180/2.5