PERST-3, bought from Zenitco Ebay, ~$1300 for a Green Std all in, took exactly 14 days. But I would say go with Ivan Tactical because his service seems outstanding from the few reports in the main PERST thread, from guys who had to do exchanges - the Ebay store is an unknown as far as service goes. Mine has one minor defect where the Blue indicator lights don't illuminate when using any IR setting - everything else is perfect. I don't care about the indicator lights.
If you test it indoors in a small room without the Diffuser, you'll probably see a whole bunch of stuff you can't see with FDA approved units due to the power (blooming, halo/rings, etc...) - tons of IR energy coming out of it. Take it outside and it is perfect. It's a LASER based illuminator, so any signature is what it is - I WOULDN'T RECOMMEND TRYING TO SEE WHAT IT LOOKS LIKE.
There is a video on TFB Side-TV of a PERST-3 compared to a MAWL C1+ and a full power DBAL - based on what I saw in that video, I thought the PERST beat them both. Being about HALF the price of the MAWL, didn't hurt either, even if the MAWL is technically better on the spec sheet...saving $1200 isn't anything to sneeze at.