Paying with a cashiers check? Need advice!


So I have a deal set up for a new to me pre here on Audiogon. The issue is the seller only wants to excepts a certified bank check. I have never paid this way before and I am a bit nervous. He says all the right things almost to much honestly. He does on the other hand have fifty some positive reviews and I talked to him on the phone as well. Which is when I got a bit more suspicious after he offered me a deal on a disk player at below half market value. He seems genuinely nice but I’m sure the best scammers do. Is there any way to get extra insurance that everything is legit? And would you guys be ok with it being he has 50 positive reviews over nearly 20 year span?  Looking forward to people thought. And thanks. 
brylandgoodman
You have the sellers phone number, name and address.  If he "breaks bad" he has a lot to lose reputation wise online or other for $2k...
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I think I’m more concerned that he is who he says he is. But I could be crazy. Just know there are all kinds out there, and I’m nervous to drop 2k in the mail just on faith. But I do really want the preamp and the price is a bit below normal. Plus I impulsively already made him a official offer, if that really matters. I guess it does to me, but still nervous. 
Lots of nice people go bad in the end. Don't do it. 
It almost sounds like you're trying to convince us to tell you it's okay. 

All the best,
Nonoise