OH, indeed, GRAB it! $150 is OK.
You can burn Anthracite nut coal, just fine, thats what we burn.
Use the grate that came in that particular stove, If you weld up a new one, make sure its the same size and configuration.
Ours is the biggest stove of the 3 that were sold, and yours sure sounds like its twin. Yes, about 150 lbs. But dont overload it, as if you put too much in, it stifles the draft. You want to see that blue flame flickering up thru the hot coals.
Practise with smaller loads, put one hod in, and see how long it burns. Also make note of how open the air intake is. If you need more heat, then with the air intake open more, then you can pile in more coal. We stoke ours morning and night, and when it went down to zero-F here on Cape Cod last night we stoked it 3 times, as we had it running hotter.
We have upon occasion, gone away for 2 or 3 days and come back and the fire is still going, throttle it way down if you wont be there to tend it for a day or so.
This link takes you to the picture part of the forum,http://nepacrossroads.com/post366255.html#p366255
The first picture of the 2 King O Heats, is the one we are using, the second picture, is our spare.
It just takes a bit of practise to figure out how nicely these burn.
A warm basement is heavenly, our stoves are in my laundry room.