I was also very tempted by this kind of offer. But they are not legal, even if they advertise themselevs as "Authorized Resellers". When you read the contract, you see that you can't register at Adobe (or others). Because what they are selling is not a clean version, but a previously owned and recorded to another person or company.
So paying for an illegal copy would not be a good choice, when you know you can get an illegal copy.. for free.
With prices more affordable, and transfer of computers and other options available, it would be easier to buy a legal version. But Adobe, like Microsoft and other big names, know the facts: there is lots of piracy, allowing people to develop their knowledge on illegal version, knowing that more legal versions have to be sold for professionnal work.
Too good to be true? Does anyone know about the legality of this company and the software that they offer?
From what I understand, the only place on Planet Earth where you can legally/safely download Adobe software is from Adobe itself...
So yes, “if it sounds too good to be true, it probably is” – often those are illegal versions of programs that come from unfamiliar sources... That site, for example, is registered in the Bahamas.
Besides the legal issues, there's also uncertainty on other fronts. See this news from last year – you never know what you could be subjecting yourself to if you install software from unknown places:
“The second Trojan was discovered Sunday, hidden inside bootlegged copies of Adobe Systems’ Photoshop CS4. Once installed, software lets someone else take remote control of the computer and sensitive data upon it.”
So, be careful out there.