First Multi- Family purchase

[Mark Paup]

So I made an offer on a 12 Plex built in 1950. The cash on cash is 12.8% and the Cap is 8.97%. The broker called and said they have 3 offers, but the buying is giving me first shot at $420,000. (Original price was $425,000) I offered $399,000 but the numbers are good at $420 I think. All the numbers look good in my opinion, but it is my first one. The building is brick, new roof, and hardwood floors. Is this a good deal considering it's age etc?