BrowningBAR; I wouldn't go that far. I have LOTS of questions for the right person. Thanks for the vote of confidence.
cb550chopper;
Heat output goes by firebox square inch size, and heating surface square inch area with outlet size, baffle, and chimney draw factors. You have the largest firebox, largest heating surface and smallest flue outlet that relates to the most heat output you're going to get.
Not sure of your terminology of what you're doing. Presuming you have a damper in the first piece of connecting pipe, this should only be wide open when lighting or opening the door. The intakes on the door, or draft caps should be spun open about 2 turns to light it. Once lit, they can be closed down to about 1 turn, and the damper closed half way. Once fire is stabilized, you can load with full size splits, and close the damper more and more as it gets hotter. If you open the draft caps a full turn, with the damper open, it should sound like the roar of an oil burner. Unless it's super cold, or you're cooking on it, you don't need that kind of fire. For overnight, the draft caps are normally set about 1/2 turn open with the damper closed or just cracked a little open, depending on chimney draft and damper plate style. (depending on the size of the holes in the damper plate.)
Since this stove was not used for so long, and sat in the humidity of summer, those bricks have probably absorbed quite a bit of moisture from the atmosphere. Water is the only thing that quenches fire. Moist brick between the stove body and fire has a tremendous effect on stove temperature. The heat simply doesn't get to the stove sides. Once the moisture is out of the brick in the form of steam, you may see a difference.
The legs are the correct length to be able to sit the stove on a hearth, and kneel in front of it on the floor. That was a normal installation, and the way they were designed to be used. Keeping them low was necessary to be able to run the pipe horizontal out the back or side to have pipe clearance under the fireplace mantle. (and be low enough to elbow up the existing fireplace flue, something you can't do with a newer top vent stove built today, hence the need for rear and side vent Fisher's today) Your installation would normally use a top vent model. On your basement floor, simply set up a hearth style pad with block or brick to raise the stove.
A baffle plate inside the stove is the best improvement you can make to lessen smoke and direct more heat to the top surface instead of the vent pipe to the rear. (It should still drive you out of the basement with or without the baffle)
Is the chimney flue 6 inch all the way up? It should be the same size as stove outlet all the way. If larger, this reduces the efficiency and changes the above suggested settings. You will need to allow more heat up the stack to achieve the same results.
If you're dissatisfied with the stove, I'd be more than happy to "refund" your $200 and remove the stove for you.
( I'm not the seller, I have a home for a couple stoves like this one! )