sellers don't accept escrow means they are scam????

I got one email from a new buyer today, his above idea made me go crazy.
He mentioned he will use escrow as his payment term only.

I told him, few China manufactories can work with you based on Escrow.com or paypal.
They are factories, not e-shops. Most of them accept T/T, unless your order is huge, they will accept L/C at sight.

His reply was as follows:
"What I have noticed is that all the scammers don't accept escrow.com and every genuine seller does. I will even pay the escrow.com fees. Its easy and free to setup an account."
He sent another email as follows:
"But L/C is not that safe. Do they offer the same service as escrow? They hold the money until I have received and inspected the goods and when I have approved the goods the factory will get paid? If so maybe I can do L/C. Does genuine companies offer free samples at all?
......
I have found companies that accept escrow.com but there prices is abit on the high side and my profit margin is too low.
......
Do I only pay you when I have received the goods and approved them or how does that work?"

I would like to explain him in details, but suddenly, I just felt I am too tire to explain such questions when the buyer can't afford any risks but want to gain.
(the reason made me crazy I think is when I don't work with him based on escrow, that means I am a scam, oh, my god. Same to you, when you don't accept escrow, you are a scam also)

I would like to ask the members here, especially the china suppliers ( when I mention suppliers, I am talking about Chinese exporting companies and factories, not including E-shops which sell branded products ): does your company accept paypal or escrow? What is your usual payment term? Do you agree to use escrow--when the buyer get the goods and find they are in good condition and then he will ask the E-bank to pay you all?

Maybe I don't know escrow too well. But I really don't think Chinese factories use this as a normal payment terms.

Another point made me crazy is, he wanted to get a free sample. But his business is digital photo frame which is more than USD100 for each unit, which sellers are willing to provide a free sample like this???I hope he is not kidding me.

I wish somebody here can help me to clear the payment terms here.

Replying to [hellojasmine]:Ask the potential Buyer to pay for the sample first. However, the sample price will be deducted once they place a bulk order with the required minimum order quantity.