What Eric does really well is to handle the shipping & especially the importing into the states...
Sure you could book a flight to Japan, board the plane with a duffel full of cash, and go used car shopping. You might even find a decent hopped up Skyline GT-X (with 2.8-3.0L triple Mikuni PHH, etc) for about the equivalent of $12-15000.
But then you have to find a shipping company
Get your car to the dock
Hope it gets packed up good
Wait while it's on the slow boat to CA
Deal with importing through US customs
Get a Title created so the vehicle can be registered in the States
Add up all those hours, and it's a no brainer that using an established service like Eric's is the way to go.
Yeah sure you end up paying a bit more than the retail price in Japan, but it takes time and effort to do the above legwork, and well it's only fair that he make a bit of cash on the side too to pay his bills.
Go with Eric - you'll be happy.
Even for cars over the 25 year age limit you are still required to have a Registered Importer responsible for taking the car through customs for any conformity work that needs to be done. In otherwords, even with all that you still need a place like JDMLegends involved.