sir, I must inform you that people who spent real money on the game get these valuables. Char mega stones are worth at least 10m so don’t try to change the fact you are trying to make an unfair trade.And by the way, show your aerodactyl ‘s ivs and evs?
Even if it was worth more, it would only be slightly a bit since mega aero is pretty common mega. Dratini is a rare pokemon like eevee and that would be an exaggeration to say it is worth ‘way more’ than dratini.