We have been tracking sales of Strategic Preview since 2005. There have been 29 sales recorded.
There have been discussions on differentiating and expanding the information available for SP in the past, but we decided against doing it at the time. One of the main reasons was that there weren't a lot of sales of #4 and #6 so the valuations would not be very accurate for those two. We already have a similar challenge with some of the very rare items that have infrequent sales.
So, your suggested expansion of the data available for Strategic Preview could *technically* be done at any time, since we have detailed records of exactly what issues were sold. Ultimately it comes down to the resources available to do so and whether there's enough data to warrant differentiating. We'll see what the future holds. Foul might want to chime in on this.
Some information that might be helpful for now.
Sales recorded per issue:
Issue#3 (13)
#4 (4)
#5 (11)
#6 (1)
The single recorded copy of #6 sold for $4,059 in 2018. It was in
VG condition. The latest recorded sale for #4 was for $1,477 in 2019. It was also in
VG condition.
The current aggregate valuation for the Strategic Previews would be fairly accurate for #3 and #5, with #4 likely selling for a higher amount than #3 or #5. It's hard to say what #6 would sell for, since there has only been the one sale recorded.
