Credibility Checklist

As you guys know business is all about trust. So here's my credibility checklist before I buy services:

-Have more than 5 portfolios
-Have more than 10 positive reviews (see if there is any good customer service and fast response)
-Have a professional looking website
looked good on mobile devices (check it on responsinator)
-Their site has been around for about 3 years (check their domain age on moonsy)
-See if there are any authorities or tutorial on their site

Forum:
-Have been registered in popular forums for about 3 years minimum and no banned
-Have at least 100 replies on their marketplace thread
-Have more than 1000 posts
-Have a professional LinkedIn profile
-Have Skype (and response me fast)
-Want to meet me face to face (this is best for long-term relationship)

If they come to my house or workplace, I would like to see:

-His business card (see if they have office or not)
-His gadget (hopefully iPhone 5S, hehe)
-His own car (if any)

Service:
-Give me free sample of their services for the first month

If they meet most of my checklist, I would definitely give it a try

So what's yours?

Your demands are good enough for a buyer to buy any services from the seller. But, I do not prefer "3 years, no ban"- because its too much time. But, a newbie has the better ability. So, along with experience I also prefer and usually buy services from newbie too. For long run of any business, trust is everything.