DC X Sonic 5inch Figures

Hello Everyone, I wanted to make this post to ask those who are in the U.S. With this question. Have you seen lately that now less of the DC X Sonic characters being less showed up in stocks at Walmart and Target? Cause lately all I seen is just Shadow as Batman and not the others. 2 days ago, I got lucky to find Knuckles as Superman. But, Not Amy as Wonder women or Tails as Cyborg. Which as of right now, are the only 2 figures I need left.

Also, how come they are expensive right now on Ebay for like $25-$50? or Out of stock like Gamestop?? Please let me know, if I do need to ask an employee to check the back room or because lately movie merch have showed up recently??