It is my grail book.
In 1988, a comic book store in Miami bought a complete run of flash including the Showcase issues all unrestored. I was in college at the time and did not have a lot of cash. He sold the 105 at NM and at the time it would have been a 9.2-9.4. I bought it for 1100.00 and I sold it for 1500.00 and because of my handling was probably a 9.0.
The sad thing is that I passed on the SC 4. Easily an 8.5 and he was selling it for 1500.00. It seemed quite expensive at the time but of course that was before the one at Soethbys sold for 4,000.
Hopefully, I will own this book one day.