Posting

I have posted an 88 Mario Lemieux power up icon card, for 450,000 coins for the past day and a half. I went to repost it, and now it says maximum amount 420,000. Mean while. The Wayne Gretzky power up icon card is posted for 525,000 coins. What is going on. Would like to know why this as suddenly changed. I have seen this same thing happen with the base Vincent Dunn card. Where its value was reduced as well. Posted it before for 50,000, and now it has a maximum of 34,000.