Hi, I’m assuming you are referring to the MIB Regular 5” Hot Topic Exclusive release (there is also a glitter variant as well as mystery mini and pop figures which all have different values).
Cadence $20-30
Luna $75-100
Celestia $75-100
Both luna & celestia are saught after but there prices also vary a lot based on who’s looking to buy at the time. I’ve seen them go for as little as $50 and as high as $200. If you are looking to buy them summer is your best time & if you are looking to sell I would wait until Oct-Dec as people will pay more around x-mas time.