Is "pneumaticair.com" a legit website?

I'm trying to order a manometer from their website everything looks legit until I clicked "order" and a personal gmail address showed up. Has anyone made a purchase from them before?
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Solution
I bet you'd need to pay with Zelle only. Those sites are very prevalent in the other gun community. They're always the only place that seems to have the hard to find stuff "in stock". I'd avoid it like the plague.
Here’s some info for the website. I think it’s suspicious that they don’t have any contact information.
I noticed that too. It has a good interface but lacks 90% of the basic features a normal website should have.