I started in a similar fashion. I had a decent collection of silver and bronze. Sold most of it and started on a Golden adventure - with focus on Flash Comics. I'm now 81 into the run, and the chase is definitely a piece of the allure of that title for me. It's not just a money battle. You really have to find them first.
In fact, the single page you bought was mine until I put it up for auction on ComicLink a couple months ago (it since made its way to eBay). It was the closest thing to issue #1 I thought I'd have. Then...I actually bought a full, unrestored copy.
Best of luck to you.