Normal Belts
Goldwrap - Great option in the early stages to increase gold find by 60-80%, and magic find by 30% whilst getting a 10% attack speed increase. The only bad thing is that it has 12 potion slots originally and you've got to upgrade it using the Horadric Cube to improve that number to 16.
Nightsmoke - 50% damage taken would go to mana is extremely high from one piece of equipment, +10% all resistances and +20 mana add much more value for this normal tier Unique belt
Exceptional Belts
All the belts in the future have 16 potions slots:
Gloom's Trap - Popular for Energy Shield builds because it gives 15% increased max mana and mana regeneration, +15 Vitality, and 5% mana stolen per hit.
Razortail - Extremely good budget belt for Amazons and Throw Barbs and all sorts of ranged physical builds who are able to take advantage of 33% piercing chance, whilst giving +15 Dexterity. With enough +skills gear an Amazon can reach 100% pierce with this particular + the related passive skill. Players can buy D2R Ladder Items and d2 resurrected runes from a trustworthy shop like MMOWTS to gain access to powerful new abilities and strategies.
Snowclash - Very strong belt for Blizzard Sorc having +2 Blizzard + 3 Glacial Spike and +3 Chilling Armor along with +15 cold absorb and +15% max cold resistance, but usually takes some time to think it is cheap
String Of Ears - Another popular belt, this time around for the 10-15% physical damage reduction, magic damage reduced by flat 10-15, and 6-8% life stolen per hit, by going budget you should expect to obtain a low rolled one but even using the lowest rolls it will likely be decent.
Thundergod's Vigor - One of the greatest belts hanging around, also known as "good" Its cost goes down following the first weeks in Ladder usually and those with the lowest defense are going to be cheap. Whenever you end up fighting an unsafe boss or opponent rich in lightning damage output this is actually the best belt to protect against it, sporting +20 lightning absorb, +10% to max lightning resistance, and +20 Strength and Vitality, along with adding 1-50 lightning damage. For Amazon additionally, it gives +3 to Lightning Fury and Lightning Strike to include massive damage and value for an already extraordinary belt.
Elite Belts
Verdungo's Hearty Cord - best budget belt for survivability in the endgame with +30-40 Vitality, 10-15% damage reduction and +10-13 replenish life and 10% faster hit recovery. You'll find the reduced rolled ones for affordable later on throughout the Ladder.