It looks to me like that particular saw is a 113.27520.
BTW, it is my favorite looking saw body out of the classic 113.*** saws. I have one I am planning on restoring. I even have an original blade guard.
Whether an older saw is right for you is up to you.
Clearly, if you have time and patience you can find a 1.5 hp motor contractor saw with an updated fence, maybe even a align-a-rip for a $100.00 or less. Maybe even haul it away price. Last year a guy had a 1hp craftsman with a delta T-square for $100.00, so real good deals can be found. That fence and rails is on my saw now. If you are in a hurry, find the best you can find at the most reasonable price with a good fence. I expect a saw with an align-a-rip, T-Square, Beisemeyer or even a Unifence would be a great place to start.
If you are in a bit of a hurry, and you are purchasing a used saw on Craigslist, it is all about availability, price and how far you are willing to drive. With a saw, maybe a good deal on a good saw is worth a few hours round trip.
Anyway, good luck with your decision making process.