NP or CP?

I am thinking of trying to talk my father in law into buying this Land Cruiser.  It is an FJ62, which means that it was only sold in the US with a slushbox, but this one has been converted to manual.  Assuming the conversion was done well, what do you think is a fair price?  They are asking $15,000.  Here is the ad: http://phoenix.craigslist.org/evl/cto/356714...