Hi Paul
I am beginner WholeSaler too and I get listings from one of the RE agent that I know of. Recently, I got a listing that is Duplex in Fremont, CA - $295,000. That price in CA is pretty good for a Duplex. However, I guess you are unable to identify which is a GOOD deal... For starters, do the following:
1. Go to Trulia.com, enter the address of the house and it will list comparable house. How the house you are looking at is priced - High, Avg. Low, etc.
2. Go to Zillow.com, find the comparables there too. They will list other things like last sold, what is the property tax on the property, etc. Property tax on the house will help you find the approximate valuation from the County (1.2% of the property price - at least in CA)
3. Find a RE Agent friend who also is a savvy with INVESTING. I have one like that... he is VERY GOOD. RE agent friends like that will help you a LOT. And the deals they bring to you are DEALS indeed... Yes, there are lot of realtors who do not know the RE business well, but lets not generalize! :)
4. Go to Bestplaces.net and find out how good the area is in terms of employment rate, unemployment rate, population growth over the years, expected pop. growth, crime rate, air pollution,traffic, etc.
5. Go to OFHEO and find out how well the city has been appreciating in the past - You can download a PDF report
6. Go to huduser.org and find out the Fair Market rents - you can download an Excel sheet report
Hope that helps you to get started. Good Luck. IM me so we both can learn more
Cheers
Ram