SC / Normal Unique assessment... (Diablo 2)

Good day!
On this server recently, I can say noob, so do not scold.
I want to ask whether the cost of something Unique items on normal?
Can they somehow improve (level, quality) in Nightmare and Hell?

Available:
1) Belt
Lenymo
Sash
Defense: 2
Required Level: 7
Durability: 12
8 boxes
Regenerate Mana 30%
All Resistances +5
+15 To Mana
+1 To Light Radius

2) Dubin
Felloak
Club
One-Hand Damage: 1 to 10 (5.5 Avg)
Required Level: 3
Durability: 24
Base Weapon Speed: [-10] Very Fast Attack Speed
+74% Enhanced Damage
+50% Damage To Undead
Adds 6-8 Fire Damage
Knockback
Lightning Resist +60%
Fire Resist +20%

3) the Sword
Blood Crescent
Scimitar
One-Hand Damage: 3 to (9-10) (6-6.5 Avg)
Required Level: 7
Required Dexterity: 21
Durability: 22
Base Weapon Speed: [-20] Very Fast Attack Speed
+63% Enhanced Damage
33% Chance Of Open Wounds
15% Increased Attack Speed
15% Life Stolen Per Hit
All Resistances +15
+15 To Life
+4 To Light Radius

4) Shield
Pelta Lunata
Buckler
Defense: 39
Required Level: 2
Required Strength: 12
Durability: 23
Chance to Block: Pal: 50%, Ama/Asn/Bar: 45%, Dru/Nec/Sor: 40%
Paladin Smite Damage: 1 to 3 (2 Avg)
+40% Enhanced Defense
+30 Defense
20% Increased Chance Of Blocking
40% Faster Block Rate
+10 To Energy
+10 To Vitality
+2 To Strength

5) two-Handed sword
Shadowfang
Two-Handed Sword
Two-Hand Damage: 16 to 34 (25 Avg)
Required Level: 12
Required Strength: 35
Required Dexterity: 27
Durability: 44
Base Weapon Speed: [0] Fast Attack Speed
+100% Enhanced Damage
Adds 10-30 Cold Damage, Cold Duration: 6 seconds
9% Mana Stolen Per Hit
9% Life Stolen Per Hit
Cold Resist 20%
-2 To Light Radius