is 160 robux w/o tax too little for this piece?

[exotic bluff]

I've been thinking about it and I feel like this art piece is way more than 160 robux, But I don't wanna ask my client to suddenly pay more, what should i do?
the piece is still a work in progress btw

[crude frost]

I think it’s may be best to keep it the same cost because u already confirmed the price but there’s nothing wrong with asking them

[exotic bluff]

I see!! I'll increase my prices next time then

also I've finished it ^^