Well, because if we're being honest, the most popular of the commander's we've covered up top are going to be Rendmaw, Creaking NestRendmaw, Creaking Nest and Winter, Cynical OpportunistWinter, Cynical Opportunist
High variance cards are typically poor design, cards like Ankh of Mishra for example
Hakbal of the Surging Soul Merfolk has a treasured history as an aggressive archetype thanks to merfolk lords like Lord of Atlantis and Master of the Pearl Trident that provide a power boost and evasion
Corners: Inspect each corner under magnification for rounding, dings or bends
Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Notes and Rules Information for Stranglehold: If an effect says You may search your library
The easiest things to check for are bends and dings on the card