That sounds about normal to me. Buehler isn't that great, and I have to think people are dumping Bench because of Torre.
When these new "Ducks on a Pond" packs come out, lots of folks will just sell-off excess inventory; so a lot of guys will drop in price. Those cards will be highly priced for a while and then slowly begin to dwindle in price (just like the cards in the sig series packs did last year).