Unlikely to be the only MS65
Trends pricing includes MS65
Coins in grades that have not been seen yet are not included in their pricing
This means there is almost certainly one or more ICCS
MS 65 or higher, even though none have ever sold.
I am excited to find out the actual population of MS65 in the future. Its not often talked about in the Silver Dollar community. Its definitely and elusive variety in any grade.