My nephew is coming to Shanghai and I was wondering if anyone knew of a good real estate agent in Jingan I could get him in touch with. His budget will be on the lower end of the spectrum.

Yep, I know a very good honest agent living in Jingan. She found several good rentals for me, and the apartment, which we bought nearly 3 years ago.
She deals mainly with lower budgets, and has fluent English, and deals mainly with expats.
I will p.m. you her contact details.
John.