Cost of the extra books:
NSX
NSX-R '92: ~450,000 (overlaps with Extra Book 2, so nothing if you already done that)
NSX-R '02: 500,000 (if purchased new)
NSX '17: 230,000
Total: ~Cr. 1,180,000 (730,000 if you already done Extra Book 2)
Silvia
S13 K's: ~65,000
S14 K's Type S: ~60,000
S15 Spec-R Aero: 68,000 (if purchased new; given in Menu Book 18)
Total: ~Cr. 125,000 (~Cr. 193,000 if S15 is also included)
Also it has come to my attention that the search dropdown on the website goes only to July update.