Is it too good to be true?

[William Hucks]

I have been looking at multifamily properties in my area and when I run the numbers with the current rents, buying for a price 10-15% below what it's listed for, and being very conservative (assuming the worst) with my expense calculations, the CoC returns are still upwards of 15%. I'm not sure if my area is just a great area or if my calculations are way off but it seems too good to be true and I was wondering if anyone could provide some tips on what to do in this situation!