I can understand selling the SS4 even though I would never sell mine. Once a knife gets to a certain point over what you paid in value it gets awfully hard not to see a pile of 20$ bills instead of a knife. I sell all the knives I don't absolutely love. Right now I have
DFLE
SS4
YKCG
Muppy
SH-E
HairyCarry
Swarden
SAR5
The only ones I would never sell are the DFLE and SS4 with the HC looking very likely to become a keeper. The YKCG is going for sure and the rest are probably going unless I fall in love with one. I may keep the Swarden as well simply because it is such a handy little knife with the neck sheath.