Is this game free to play?
Does it have free trading?
Is there an "Arreat Summit"-type of website showing items and info and whatnot for this game?

35 usd for the basic bundle.

There is a open trading market in game that costs a little bit of in game gold to use.

Not sure on the third question just started the game.

The third question, your best bet is the following website:

https://darkanddarker.wiki.spellsandguns.com/Dark_and_Darker_Wiki

IT does not have all of the info at the moment but it does have a lot. Most gear in the game rolls any random stats and a good chunk of them are useless such as item equip speed, magical and regular interaction speed.... and, varying on the classes, certain spell capacity % and knowledge.

ty



tyvm