It looks amateurish but legit to me. The domain was registered in 2001, to the same address as the contact details on the website. The phone number is to a real phone, not a mobile or a non-geographic number. I would certainly phone to get a better impression.
When you're working on a tight margin every penny counts.
I had a customer refuse to buy something off me as I only took Paypal payments. He wanted me to take his card details over the phone and told me I wasn't a professional outfit unless I did. I politely told him that having a Credit/Debit Card merchant account would absorb around 20-30% of my profits at the moment and he was welcome to go elsewhere.
8 Months later he placed an order via Paypal ......