Aye? I think you might've missed the mileage. As I said, modern Evos, DC2s and similar Japanese cars with far less of a cult status in America, in similar condition have been going for more. R32 prices worldwide have been skyrocketing, America more-so than elsewhere. I'm not sure what relevance the 'normal figure' remark has because this isn't some rough grade 3 car like they all seem to be. It doesn't really make sense to say that R32s are more expensive in Japan than they are than the US because that's where they come from? The ones sold in America are marked up from auction sites and sales over there. They're far more expensive there now but that's pretty much wholely due to the massive influx of demand for them now.
Highly modified ones or really really tidy ones approach 30-50k, sure (those are over valued though), bit considering what higher mileage Supras go over there, as well as just moderately tidy R34s, 90k for probably the most immaculate R32 outside of the company owned ones is a steal.
I didn't miss the mileage at all; that's the only reason it commands the value it's at. It would fetch similar pricing here based on the last 3 to go to auction: One sold in January for $60,500 with under 24,000 miles in complete OEM condition. One sold the previous year for $82,500 with under 10,000 miles. A '92 example with 4,100 miles sold for $87,000 a month ago. You can see where the US market sits on the car in peak condition.
The majority of R32s coming into the US are nowhere close to being so pristine. Most have easily 50,000+ miles on them because they are the cheapest examples to pick up in Japan and ship over here. All I did was quickly google them, and the prices have normalized as they bring more into market. Here's what a couple examples have sold for through 1 importer:
-'90 w/ 39.3k: $22,500
-'91 w/ 81.2k: $25,900
-'91 w/ 35.6k: $27,900
-'92 w/ 65.6k: $27,500
-'92 w/ 23.5k: $28,500
-'92 w/ 157k: $25,900
-'89 w/ 92.5k: $25,500
-'92 w/ 72.1k: $23,500
-'92 w/ 77.7k: $26,900
-'91 w/ 81.2k: $25,900
Japanese Classics has a couple GT-R examples as well. There is a '91 pending at $28,995 with 78,000 miles & a '92 with POA at 53,000 miles. This right around what I saw them going for over a year ago.
Not a single example fetches over $30,000 & the only reason the pricing likes to vary regardless of year & mileage is that unlike 95% of other used cars, modifications get factored into the sale. So per your original post, I don't foresee rougher ones approaching $35,000 any time soon. These examples above are not super clean, but they're not very rough, either. But, they demonstrate the average value for the average example for sale. Highly modified ones are barely commanding $40,000 because they typically still have high mileage and $10,000 over the average price for, usually, 500-600whp is about fair. The tidy ones are on spot & up as shown by auction results.
If prices are rising in Japan, it's because there's likely an influx of US buyers trying to grab what's still left before they have to pay for higher quality examples which will reflect back over here. But, I'm sure the market has bottomed out as importers begin searching for the R33 examples as 2020 is only a couple years out.
I fully expect R34 GT-R values to match the current high values of Mk. IV Supra Turbos.