NY,
Here are three sources which you can trust. These folks are friends of the bonsai community.
Internationalbonsai.com, Bill Valavanis' arboretum. He has Mikawa JBP in his catalog this year for $125, shipping included. Trees are 3 gallon stock with 2" trunks. He only ships 'til April
Brent at evergreengardenworks.com has mature container grown pines, "Hachi Gen" cultiver. Price range $150 and up + shipping.
Martha at meehansminiatures.com has pines at reasonable prices. I recently bought a Mikawa with a 1" trunk in a 2 gallon container for $50. You'll have to pay shipping. You won't find this type of stock on her website, contact her by email and tell her what you want. She has many pines, I was there in October.
I've done business with all of these people and recommend them highly. They are trustworthy and dedicated to quality. They all know how to package so the plants arrive in good condition.
I would not pay $170 for the pictured tree if there are other options. Good luck.
Augustine
Central MD - 7A