There is an auction house, 's called Military surplus. Monthly fee is the usual tenner or so. Crafting is a bit broken at the moment, in that it's rare to craft something useful at your level. Works by breaking down loot for components and looting recipies, mostly for mods to your armour and weapons. It's due for a major revamp in an upcoming patch.
It plays like most other mmo's out there. The class system is a bit different, in that you specialise at levels 5, 15 and 25. For example 0-recruit, 5- soldier, 15, ranger, 25 spy. You can clone before each specialisation, so you never have to start from scratch again. Once you hit 25 for example, you could clone and choose sniper instead of spy, and have two lvl 25 characters with different classes.
There are a lot of story instances in the game, reminds me a bit of lotr in this regard. The game world is really well done and atmospheric, you really feel like you're in the middle of a warzone in some places.
Have a look at the video over at
www.rgtr.com, will give you a feel for it.