At first glance, their English is poor. This is a warning signal. It appears that these people are agents or 'middle men'. Personally, I would not deal with people who don't even have an address; just a P.O. box number!
You can try contacting the Tampa, FL, BBB and check their reputation.
as a matter of fact, i did end up buying an ipod and a samsung galaxy through them. igot my item in a very short time and i was very happy with my purchase.
i believe this electronicbolt.com could be the next big thing.