I've also PM'd you about this question, but just to summarize: Redhare is a large bulk supplier, and they don't work with businesses who have a turnover of less than $100,000 per year.
The margins on mobile phones are quite small, so the company has high MOQs and only accepts payment by wire transfer & TTs. This is quite common for bulk wholesalers, as the risk of accepting other payment methods like PayPal are too high. (1. Fees really cut into their margins, and 2. they are more likely to get ripped off by dodgy buyers - yip, scams happen the other way around too!).
I have every reason to believe RedHare is a genuine supplier, but I have contacted the company on your behalf to ask for further information, and will let you know as soon as they reply.