So, how long does it take for one to learn not to waste so much time
trying to attribute. I've been VAMMING for 8 months now and still spinning
wheels. Copied SeatedNut's list of worthwhile 78 VAMS. If I don't have one of those
I'll move on right away. Very grateful for the advice from all.
My advice was specific to this particular coin and the possibility for profit by attributing it.
I can't answer your question without knowing your motivation. If you are wanting to learn to complete a collection, then you won't waste any time because you decide what level of effort is needed to reach your goals.
On the other hand if you intend to use your knowledge to profit from Vams you definitely need to narrow your search. The first tool in your toolbox should be the "VamView Price Guide". Other resources will include the conversations on VamWorld, the PCGS registry sets (specifically the holes in the sets), and the Buy/Sell/Trade section of VamWorld.
I got in it to build a collection and have sold duplicates to expand/improve.