When is it good to have a dented frame?

So my free road bike was too big for me. I think I rode it 81 miles total. 75 miles on the Apple Cider and then 6 miles tuning it up. The previous owner might have taken it around the block. I took the tags out of the spokes.

Riding it was fine...but standing over it was a bit tricky. I ordered myself a similar but better frame off ebay and it showed up with a dent in the seat down tube! So I got upset and started talking to the guy who I bought it from. Turns out I'm a moron and its there on purpose for braze-on derailleur mounts. The old frame had the exact same thing upon inspection!

This free bike is getting expensive, though! The fork from the old bike didn't match well so I had to buy a new fork and well it had to be a pretty carbon one. Then I start looking at the components on the old bike and well gee....I can find used upgrades on ebay.

I ordered some more tools (headset press and fork vise) that I really need before I can do much more and of course I get an email back that the tools won't be delivered until 11/20!! Glad I have more bikes. I could have just had a bike shop press the headset, but I decided I'm going to do the whole build...or at least make the attempt!

And I forgot to take a picture of the old bike before I disassembled it! Woops...

About 20 minutes to disassemble everything I wanted off the old bike and now I just hope to build the new bike by spring! :P