I won't say how much all up since I actually bought it off someone who was importing it for themselves and was willing to sell before it landed here.
But basically, the importer who brought it over uses global auto a lot. He says they are one of the more reliable groups, they don't buy accident cars and do really thorough checks. Accordingly, they arent the cheapest and most of them are modded.
Either way, the importer organises another check of the car in japan, more photos, shipping, compliancing and registration. Again, there is still the risk of the car coming here and not making it through compliance (it is rare but still should be considered) and the car will have to be purchased by the buyer rather than the importer first.
If you want more info, please pm