Well, if we are talking about Mirai Trunks, he is 
far more expensive than Vegeta, but not Majin 
Vegeta, it really depend on the shot, as far as I 
know there are far more primo Vegeta cels, than 
primo Mirai Trunks cels, remember he appear in 
far less episodes

the most expensive cel I ever seen is a $3700 
Mirai Trunks cel on DB cel town, I had made him 
offers of $2000 and got turn down, I actually 
have one close up shot from the same sequence, 
but I love the sequence so much, I am willing to 
pay up to $2000 for another one, if I don't 
already have one, I probably would buy it at his 
asking price of $3700

I am always willing to pay the very maximum for 
the very best, primo shots (character must be 
look forward, close up shot, mouth must be 
closed), there are only around 5 sequence in DBZ 
that has primo long hair Trunks cels, I actually 
counted, the only Trunks cels I am interested 
must be from these 5 sequences, for short hair 
Trunks maybe 6 sequences, another one of my dream 
cel is the pan cel of when he first show up with 
Vegeta to fight Cell, man that is a $3000 cel, 
got one I will buy it at this amount without 
thinking twice, that pan cel is too beautiful.

I would trade one of my DBZ Gogeta cel   a primo 
Majin Vegeta cel or $3000 for that pan cel, or 
$2000 for one from the same sequence as the DB 
Cel Town has (Close Up only, I am not interested 
in tiny shot)