Buyer fees in Japan are typically 90,000 - 100,000 yen not 160,000 yen.
For 160,000 yen they would need to be doing more than just buying for you they would need to be giving an inspection worth a damn which a LOT of them don't and won't and can't.
As for reliability, my 34 GTR (stock and after modifications when it was making 300awkw) was the most reliable car I ever owned and was never once off the road for repair. It had a genuine 74,000 km's on it and presented a lot better than some of these cars coming in these days with "30,000kms" inside and out.