Many of those cards, after seeing sudden spikes, are now declining back, trying to find a new price point
In the competitive sphere, Dialga has endured across generations due to its impressive stat distribution and versatile movepool
Because of that, cards like Yore-Tiller Nephilim (or Leveler, or Nezumi Shortfang, etc.) are going to drop down into the $1-$2 range almost immediately
Mortys Conviction 211/162 Full art character cards are almost always a hit, especially if they feature fan-favorite mons like Gengar
2013-06-07 If you cant cast the card, perhaps because there are no legal targets available, it remains exiled with no time counters on it, and its no longer suspended