If you have any time to spare, I would appreciate the insight of someone with your expertise.

[Bin Duan]

I came across this expression: someone with your expertise. Is it a common collocation? If it is, what does it mean? How should I use it. Please show me some example sentences. This expression is in the second image above.

 

[Barque]

someone with your expertise. Is it a common collocation?

Yes. You're more likely to come across it in writing or in formal to semi-formal speech however.

If it is, what does it mean?

...I would appreciate the insight of someone who has your expertise [in a particular field].
Here the writer means: I need insight from someone with expertise in this field. You have such expertise. I've therefore come to you.

 

[Bin Duan]

Thanks for your insight, I really appreciate the enlightenment of someone with your expertise.

 

[Tarheel]

Thanks for your insight. I really appreciate the enlightenment of someone with your expertise.

Clever!