[Amps] Interesting new amplifier

[Bill Turner]

4Z4RB has been selling amplifier boards on eBay for some time, but I
see he now is selling a complete amp (less power supply) at a pretty
good price:

http://www.ebay.com/itm/1500w-2-x-LDMOS-LINEAR-POWER-AMPLIFIER-LEGAL-LIMIT-/162503347501?

Obviously not FCC approved. I suspect he gets around that by claiming,
in effect, that it is homebrewed. Is that legal?

I sent him a message asking about duty cycle at full power and if a
manual can be downloaded. Waiting for reply. 

Does anyone have any experience or comments about the amp or the
seller?

73, Bill W6WRT