Hey Larob. Adam is da man at Darkshadow Collectibles. The Godfather is Bob from Fireside Collectibles. Mike runs A&R Computer, and DarkLords and Queens, or is that run by his offsider Joann? Anyway, Mike is in the process of starting up Razor's Edge Collectibles. I guess the computer store is breaking in two. Last but by no means least is Marc Bowker of Alter Ego Comics.
I don't know if there is a way to determine who is better or how they could become better. I have dealt with the first three and all my transactions went smoothly. I did have some hiccups with Adam, that were just due to circumstances beyond our controls, and he did a sterling job of bending over backwards and making sure I was happy at each stage of the process. Any uncertainties, confusion or misunderstandings were sorted out, without my having to prod and probe.
All in all, you can deal in confidence, and knowing all your concerns will be abated, no matter who of these excellent people you choose to make a purchase from. Stress less, go with the best.