Why are these lands being bought for $1K? | tcgmode

I use manabox to keep track of my cards, and tcgplayer if what they uses for card pricing. Adagia (a 5$ card) suddenly jumped to 60$ during the weekend. I went to check on TCG and saw that there was a sale for 1K. I thought maybe it was a bug so I just ignored it. However the same thing happene...