Trading mega bat dragon advice

Hey everyone,

I’m currently trying to trade my mega bat dragon for neon bat dragon, mega shadow and adds. But I’m scared to trade it then it suddenly rises a bunch and I’ve lost out on value, if mega bat is 36.5 would I be expecting overpay, underpay? I don’t know what would be acceptable to trade it for

It’s just a big decision and idk what to do 😭