All Nintendo Amiibo's Prices are lower. Firm said

The prices of most figures are soaring on second-hand markets, others are decline at retail.

Amiibo figures was expensive so Nintendo has quietly dropped retail prices of three of the most selled ( Donkey Kong, Yoshi and Peach ) who came out in November now cost $10 write on Nintendo official website.

The Nintendo hasn't made official regarding of price drops, but it don't take so long after the first "wave" toys have released

Also they said moe coming in March

One month earlier, Nintendo show 10 top selling Amiibo figures in few regions in world. 

All three of the discounted character are in top 10 in UK and Canada bu t this could at last in part be attributed to their wide availability

Also there is other figures like Marth and Villager, and they are good selling but on some website like eBay etc.

President of Nintendo Satoru Iwata also said something about Amiibo figures, saying extra shipments of hard to find figures is problem and something must be changed there and delivered

"It is difficult for us to promise to continuously ship all of the Amiibo figures," he said. "We will, however, consider additional production in cases such as when an Amiibo figure sells out shortly after launch, an Amiibo is indispensable to play a certain game, and when we receive a lot of requests for an Amiibo figure from consumers and retailers."

By the way at the moment 5.7 million Amiibo figures have been sold to date.