Confirming Rent Prices

[James Wilcox]

I am looking to pick up my first duplex. Both sides are currently rented out and I was told the rent was the following.

Unit A) 850/month

Unit B) 800/month

However, this seems high to me based on the area. Not saying it is not possible, but my first impression is something like the following. ($100 difference)

Unit A) 800/month

Unit B) 750/month

My question is how do I "confirm" what the rent actually is? I don't want to just take their word for it. Can I ask to see the rental contracts or past rental prices? Place does look like it may have been renovated recently so that might explain for a bit higher rent.