Kiln

That is a three stack pottery kiln with pain-in-butt sitter switch(control).
Great for pottery and will easily melt glass well.
I bought one in about the same shape for $200, bought a controller off Ebay for $125. But have not put it together yet.

I prefer you to buy a glass kiln with a ramp/hold controller(see Sentry ramp hold controller/computer).
i went ahead and bought a Paragon 10 used for $500 with a Sentry 3.0 controller, both my kilns are Paragon with Sentry 3.0 controller.
The good US made ramp/hold controllers are costly but easy to use and bulletproof.
Look on Craig's list and eBay for one with a ramp/hold controller. People are selling them, vase and plate glass biz is depressed.

Most glass kilns have heat in the top lid, glass likes top heat.