In my opinion the values listed should be pretty conservative for a traditional Sunday evening GunBroker auction.

In the last 3 years I've been watching fairly closely and those two variations are not at all common and bring a premium. In my own experience, I purchased a very nice SV for a little over $700 in 2012, and a post war S with prewar numbered grips and also paid over $700 for that one in 2013.

It's a very collectable variation!