[PC] Someone sent me an offer with CS:GO skins, what are they worth?

Someone sent me an offer with CS:GO items and I don't play CS:GO nor have I ever traded CS:GO items so I have no idea what they are.

My

• Blizzardy Storm Trophy Belt

for

• Strange Festive Rainbow Sniper Rifle (Well-Worn)
• Man-o'-War AWP (Minimal Wear)
• Fire Elemental P2000 (Factory New)
• Aquamarine AK-47 (Field-tested)

Is it worth it?