Found a multifamily investment property - worth a deal?

[Shayan Sameer]

Hello, I found an investment opportunity... it's a duplex/triplex offering a total of 5 rental units.  All are currently tenant-occupied.  It is located in Lexington, NC.  Each unit is individually metered for power and water.  Each unit is rented right now for $500/month.  The seller is asking $500k... Before I negotiate, is it worth looking into this?  I've never owned a duplex/triplex unit as a rental.  Let me know your thoughts please.