All About Pocket Knives

Hey Folks:
Just got a couple of old case 6392's, both from 40-64 CASE/XX stamped,
the clips and sheepsfoot are about gone but not broken, the speys are in decent condition. I have pictured them side by side showing the handle breaks, one is on shield side at center rivet, a chunk about 3/4" is gone,the other is on opposite of second knife side at same place but much smaller nick. Most of the blades walk and talk now, None have yet to be cleaned or oiled. The bolsters are in very good condition.
The question is, what would be a good auction start for both combined, should a reserve be placed, Im not married to the two but I do believe there is some value there. Or are they ready for the last stop. red bone handles.
Thanks for any and all help.
Mossdancer,

Heya Moss,
would like to try out the formual they use in the Standard Knife Collector's Guide, as I have not used it personally for pricing knives.
The RBR Scales is what is is called, and I looked up Case XX,
so they take chart value (250) x Pattern Value (.60) x Handle Value (1.10, I went lowest Bone on the chart) x condition (.40 I went lowest end of fair)

Just based on that formula I come up with about $66
Of course I am just going off the description, and went worse case senario. Because if we add in suggested damage %'s as well, that would come into play with that number.
So if both knives were about the same, thats looking at $132, Mint book I think I read was $250 for one.

Now you did say broken Handle and I can see one in the picture, so guessing on that one knife it can take a 4% hit maybe?
Blades I am no expert on how they figure out blade wear, but those can slam in some percentages as well.
So make the call based off:
Backsprings: You say the blades walk and talk decent, so I assume they are good
Blades: deduct 40% ea for broken blade, 3% ea per scratch, 5% ea if gapped to 1/16, 10% if gapped to 1/4, 25% if more than 1/4, 5% each dubbed to 1/4, 35% ea more than 1/4 dub
Bolsters: 35% ea if missing, 5% ea Slightly battered, 25% Badly Battered
Brand Stamping: subtract 5% if Hardly Visible, 10% Magnified, only, 25% Totally Erased
Handles: Cracks, checks and hairline: Not through 4% ea, Through 25% ea, loose 10% ea
Shrunken: Hardly visible: 4% ea disfiguring 25% ea

Rust pitting: Harly visible 35 ea, Quite visible: 10% ea, disfiguring, 25% ea.

So you could assess your damages from the $66, and start from there, hope this helps, as this is a first for me using this system.