I got mine about 7 months ago from here
At only $2,000.00 by advancedreworks.com
I was lucky they give a decent support because the user manual doesn't explain anything about what and what not to look for when doing a process.
I was banging my head on a desk with no idea and was all my fault cause they had recommended me I get it with the omega thermocouple and dont use the stock ones that are not too accurate. After I started using it with the omega thermocouple I saw a big difference. I can see solder balls melt within 5c of what should be.