Pickup Radius

Pickup Radius is a character property that determines how close a character must be to health orbs or gold on the ground in order to pick them up. This is a very valuable property, and most players strive to add at least 5-7 yards to their default value. It's convenient for quicker gold gathering and can be life-saving by grabbing health orbs that aren't right beside a character when they appear.

The default pickup radius is about 3 yards (in game terms), and the character window displays how much that base value is being increased by. Increased pickup radius affixes can spawn on most types of items, and a number of legendary and set items offer an increase to this stat as an inherent property.

Beyond mere convenience, a number of character builds require or are greatly improved by larger pickup radius since various skills trigger effects each time a health orb is grabbed, or trigger proc effects if monsters die within a character's pickup radius.

Pickup Radius on Items

Pickup radius can be increased from 2-7 yards per item, via random affixes.[1] For gear found in Inferno, the value is always 5-7 yards from a random affix, and most characters try to get at least one such item on their characters, but few characters put much value on more than 2 or 3 items with this modifier. As a result Pickup Radius isn't as valued as the best stats such as CC, CD, IAS, or Res All, but pickup radius does add considerable function and value when it spawns on a top quality item.

Note that the Paragon 2.0 system is set to enable Pickup Radius to be increased via Paragon Points, which might greatly alter (probably by lowering) the value of this property on items.

Pickup Radius can occur via a random affix on all types of armor.

Helms
Chest Armor
Shoulders
Belts
Bracers
Gloves
- Inherent 7 yards on Frostburn Gauntlets.
Pants
Boots
- Inherent Lut Socks 3 yards.

Pickup Radius can not appear as a random affix on:

Weapons (all types).
Offhand items (shields, quivers, mojos, sources)
- It's an inherent property with +20 yards on Thing of the Deep.
Rings
- It's an inherent property on the Puzzle Ring and Leoric's Signet.
Amulets

Skills and Pickup Radius

No skills boost pickup radius, but all skills that proc with health orbs benefit greatly from increased pickup radius. There are also several skills that function via a radius from the character, and in some cases the area of effect is boosted by pickup radius.

By far the most impactful is the Witch Doctor, who has an entire build largely predicated on high pickup radius. The legendary mojo Thing of the Deep is much-valued by Witch Doctors for the overall stats, but especially for the +20 yards to pickup radius; a bonus equivalent to any three other pickup radius items in the game. WDs with 20 yards or more (up to 40 is not uncommon) pickup radius leverage that via several skills:

Circle of Life -- Whenever an enemy dies within 12 yards, there is a 30% chance that a Zombie Dog will automatically emerge. The range of this effect is increased by items that increase your gold pickup radius.
Gruesome Feast -- Whenever you are healed by a health globe, you gain 10% of your maximum Mana and 10% Intelligence for 10 seconds. The Intelligence bonus can stack up to 5 times.
Grave Injustice -- Whenever an enemy dies within 8 yards, regain 2% of your maximum Life and Mana and the cooldown on all of your abilities is reduced by 1 second. This range is extended by items that increase your gold pickup radius.

No other class benefits nearly as much from Pickup Radius as the Witch Doctor. The closest is the Demon Hunter, via her Vengeance passive skill. More pickup radius makes Vengeance much quicker/easier to recharge.

Vengeance -- Your maximum Hatred is increased by 25. In addition, gain 20 Hatred and 2 Discipline whenever you are healed by a health globe.

The Diablo 3 Developers have talked about implementing additional skills that would trigger procs via health orbs, and those would obviously benefit from pickup radius. This is only speculation at this point, though.