Not exact matches
Exploration
rewards you with Vantage Points that give you a glimpse into the old world or with collectible sets that you can use to
trade for
rare items.
In the retail
trade, such thoughtfulness is
rare, but it can be
rewarded by customer loyalty.
Later in the game you get given vouchers as a
reward for completing some requests which can be
traded for various items so, although dull, requests are a good way to get money and
rare items.
There's still so much to go through in the game like Divination Cards which grant
rewards when
trading a stack; Exalted Orbs which grant random affixes to
rare equipment and Chaos Orbs which reforge weapons with new stats; two different entities to side with in the War for the Atlas; map tiers to grind for;
trading, which honestly can range from great to incredibly shady; and joining with other players.
It featurs what is, to the best of my knowledge and searching, the very first transforming final boss in the history of RPGs as well as the first appearance of the mini-medals, a set of little medals to
reward particularly exploring heroes which could be
traded in for
rare items to the Medal King.