we usually wait a while after a collectible is released before placing them anywhere, that way the value gets to relatively stabilize and it won't have to be moved every other dayHey, I didn't buy or sell anything, but I do have a suggestion for the tier list:
For the cocotryoshika (I hope I spelled it right) I sold mine for 100 tbt and I've seen some users buy/sell them for around 100/200tbt and I think it belongs in the common section. Feel free to place it wherever you want as it's just my personal opinion, but I hope that gives you an idea on what they go for