Are there always price spikes leading up to an unrestriction? I couldn't figure out why Burning Wish suddenly jumped from $8 to $15 last week, but I guess info leaked out? That's annoying, but at least I got one in time. I just happened to be looking for them thinking they'd be good to hold on to for when WotC finally messed up printing a red draw/ritual card..
Sounds like good market strategy, spike up all possibly unrestricable cards before announcement just in case so people don't buy them cheap, then put normal price back if nothing moved.
Good thought, but no changes with Earthcraft, Hermit Druid, Mind Twist, etc.
Doesn't have to be a noticeable change. I'm sure a simple script would do when you know the time and date of the unrestrictions. 5 minutes before the announcement, put everything on banned list out of stock, if no changes, run script again and put back quantities. If there is a change, then decide how much the new unrestricted card is worth.
I'm sure big websites have something similar in place.