No, I haven't dealt with 316steel.com either, sorry. They look good, though. I checked their website - it was created in 2006 and the expiry date for the domain is not until 2015. Of course, this is not a guaranteed way of telling whether this supplier is good or bad, but the following info would hopefully help you build up an overall picture.
They accept credit/debit card payments via PayPal.
While they don't ship samples, they only require a minimum of US $199 per wholesale order.
They offer volume discounts and free shipping for orders over US $299.
They ship to all countries worldwide. They don't drop ship, though.
You can use their pictures for resell free of charge.
You can find out more here:
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Or contact them at info@316Steel.com if you have any further questions. In fact, it would be good to ask them as many questions about their products and policies as you can before you go any further.
I wasn't able to find any useful reviews or comments about them so guys, if anyone here has had any experience dealing with 316steel.com, your feedback would be much appreciated!