I can show you some houses in my area (not particularly fixed up) built in 1946-1950 that are selling for $400,000-$500,000. In fact, the house I grew up in, built in the 1940s (but added onto several times) is now on the market for around $800,000.
I just did a search on homes in Fairfax County built in 1946. The average is over $400,000. Here's a link: http://mrislistings.mris.com/Matrix/Public/Portal.aspx?ID=42
If you're interested in that house, find a Realtor (not the listing agent). Have the Realtor do a CMA (competitive market analysis) to determine the value of the property. That'll tell you what it's worth.
If you need any help in the area, feel free to call, email, or text me!
And some people view it as a POSITIVE, not a negative.
Location, Size and Condition are all more important to Buyers.
Has the house been upgraded; new plumbing, new electrical. new kitchen.
Too many factors to make it a bland-and-white situation.
$45,000 sounds very interesting.