Frozen Horror Artifacts:
The Amulet of the North: 700 gold
Reason: This one is a bit difficult to place value on, where the Armband of Healing adds 2 additional body points that can save a hero from death, this also adds 2BP, but before every quest. So you gotta wonder which is more important? It may add up the same but this adds confidence to the start of the game, but Armband of Healing adds safety towards the end of the game.
However there's also an additional mind point to factor in as well as who can wear it and where it applies: this is only valuable to the Barbarian and can only be worn around the neck. The only trouble this adds is wearing the Talisman of Lore at the same time, Armband of Healing can hinder the Wizard's and Elf's bracers.
Armband of Ice: 350 gold
Reason: the Frozen Horror is the most dangerous and difficult of the Hero Quest games, in the desolate cold heroes can die very easily. This artifact, however, gives you a few less things to worry about such as Ice Vaults and Rivers, Mind Freeze and Chill spells, etc. Only problem is it can hinder the Bracers the Wizard or Elf might wear and it doesn't really have a use after the Frozen Horror expansion.
I liken it to be more powerful then the Fire Ring, except it doesn't have a use beyond this expansion.
Ring of Warmth: 300 gold
Reason: it's not as protective as the Armband of Ice as this can't protect from Mind Freeze, but the heroes have less to wear around their fingers then on their arms.
Snowshoes of Speed : 400 gold
Reason: these shoes can be underappreciated considering what they can do. Once acquiring these the best thing to do is put them on a hero with Plate Mail. As much as Plate Mail slows a hero down, these can help him keep pace as well as preventing slippage and the possibility of rolling off into the ice chasm.
The only down side is you can't use them after the Frozen Horror.
Spell Scroll: Chill- 150 gold
Reason: it's a certified 1 hit, better then Fire of Wrath in that sense, however you need to be close enough to touch to work this spell. So it's slightly better then Gire of Wrath but not as good as Magical Throwing Daggers The smart hero will use it on the monster that's down to 1 BP.
Spell Scroll: Ice Bridge- 175 gold
Reason: although it's a spell of limited use, a Potion of Dexterity (listed at 100 gold) can do just as well except all heroes can benefit from crossing the Ice Chasm.
Spell Scroll: Ice Storm- 300 gold
Reason: this can do a maximum of 12 damage up to 4 monsters at once. Odds are you're not gonna get that lucky, so we're looking closer to 6. It's a 1 time use and the only spell scroll that'll effect more then 1 monsters at once. However I can't find the heart to rank any 1-time spell use more then 300.
Spell Scroll: Psychic Recovery- 200 gold
Reason: it's very unlikely that the Wizard will fail to roll any

s when Mind Freeze is cast against him. Most likely it would be cast against Barbarian or Dwarf, so I don't see this healing any more then 3MP. The only time it's detrimental is when a hero reaches 0MP, and although that CAN happen there's really no other use for this spell.
Spell Scroll: Skate- 150 gold
Reason: this spell encapsulates the Veil of Mist power (100 gold) and let's you add 6 spaces to movement while avoiding slippage (150 gold), but I'm taking off 100 because this spell can only be cast on the hero reading the scroll, you can't cast it on a friend.
Spell Scroll: Warmth- 225 gold
Reason: I've valued the Heal Body Spell Scroll at 300 gold, which recovers 4BP, this only does 3.
As stated earlier, I'm ranking 1BP to the value of 150 gold, but spell scrolls lose value because it costs an action to cast.