@Shane Brown I'm pretty sure that place has been on the market longer than that, I think it was for sale when I was looking around last fall, they probably re-listed it - 90k isn't an unreasonble price, that means you have to offer less than 90k and have room to move up.
At least go look at it, look at neighboring properties, look at how the tenants live, verify heat type like Amy said, just completely avoid if it's electric heat (it looks like it's Rinnais though) unless you want to spend a few thousand on gas installs. If you meet a tenant - ask them how much the gas bill is, ask them if they have issues with the place, they'll let you know about how the landlord didn't fix X, Y, Z.
You can look at numbers all day, but it really comes down to if you're comfortable purchasing that property in that location. You'll never be 100% comfortable with going for it the first time, and you'll likely have anxiety for months afterward wondering if it was a good choice/thinking about everything you want to fix - you just have to do your best to make good purchase.
I think 800/mo is reasonable rent expectation, that's what I charge for the 1br unit in the duplex I bought, and other 1br units are renting for 850-875 in St. A. I could preach about tenant screening, but my tenant was inherited, so I frankly didn't do any - but would if I had to get another. I would recommend verifying leases/getting estoppel agreements, and using month to month lease terms instead of yearly (hopefully current tenants are close to end of lease or M2M already so they could sign your new lease). This way you can get rid of low quality tenants quickly instead of riding out a year lease/evictions. Oh. Whatever you think your fix up costs are going to be - double them, and however long you think it's going to take, double that too. It doesn't look in that bad of shape really. Get a decent inspector and do the walk through with them.
Overall though - this property isn't going anywhere - if you're not sure about it, wait for something else in an area you're more comfortable with. I would ignore almost anything on the MLS right now, pretty high prices.