Yes, the RHD JDM imports killed the value of the domestically sold Land Cruisers. Now the volume and the end of the JDM craze is hurting the value of the JDM Land Cruisers. For those that last the 25 years, we might see their value spike again when they become available for export into the US.
Already there are some 61s and 73s/74s are getting very close to the export age. I have yet to have anyone come up to me in Canada and offer to buy my Safari. Every time I drive into the states I get at least one offer. What surprises me is that there are more people who know what it is in the US than in Canada. Likely it is just the number of people who have served or are serving in the US military that leads to the greater recognition there.