Currently as they are, nobody would want them over say another pair of enchanted boots
I would prefer see more that offered skill bonuses over say..+6 saves
What Stag Boots could offer +8 influence for their price (this is just example)
Snake Skin could offer +8 and still fall in being better then Hectors but not as good as Elven boots that can be aquire.
Bodak could offer 10 resist to negative, +8 to concentration, +5 to parry or some other skill bonus that would be appropriate for undead skin.
Think the easiest thing would be to change up the universal saves with something a little more "flavorful" to each style of boot.
Each get +1 AC (dodge)
Ancient Dire Bear +3 Fort Save +3 save vs fear (3000)
Croc +3 Fort Save, +1 will (3000)
Dire craig cat +3 reflex save +3 tumble (3000)
Troll +4 fort save (3000)
Ebon Tiger +3 reflex save, +1 hide +1 MS (3000)
White Stag +2 Reflex Save, +2 Will save (3000)
Bodak +2 Fort Save +4 Save vs Death (3000)
Gargoyle +1 universal save (3000)
Wolf, Bear (all except dire) +1 fort save, +3 save vs cold (2000)
Dire Bear +2 fort save (2000)
Snakeskin +1 reflex save, +1 hide, +1 MS (2000)