Trade advice quick

Some one has offered to trade me my Sananda for a full Evo master gunner.
But they also want 4 luci ,Kratos, 2 yinglong and 2 hp?????????
Am I being ripped off????

want kind of master gunner is it?
is it a 4-6? a 6-10? etc... that makes a lot of difference

if it is not even a 4-6 but something like a 4-0 it is trash, post the atk and def numbers of it and the skill lvl and I will tell you what it is worth.

It's at level 19 about 9700

It's a 5-8 I've gone for it.