https://wiki.project1999.com/Deathbringer%27s_Rod - super cheap and good 2h (slow though)
https://wiki.project1999.com/Sword_of_Pain (I got this on a level 5 DE SK - you will need to be min level 5, most likely need a drag/rez into the pit, and will need a WC cap or porter to get out unless you do a drag/res again to the front) - an enchanter can solo the dogs down there otherwise you probably need a 3 man crew, the good news is it seems to drop a lot and is RIGHT at the drop in
https://wiki.project1999.com/Circlet_of_Shadows - the prenerf version is cool, but the post nerf version is just fine and costs almost nothing.
The best piece(s) of gear a Shadow Knight can have are the Feign Death leggings and/or a fungi but neither are budget items.