>>7385231KB was more of like Ollie's back in the day. All the toys you found in the front of the store, were usually toys from a few years ago, that KB bought up and was liquidating for low prices, while toys in the back of the store were new and cost more than what you'd pay at other retailers(you weren't exactly going to go bargain hunting once you were already in the door because of the liquidation sales). Because of this they always had things like MarvelToybiz figures for like $5 a piece.
>Machine WarsThat was an exclusive line. It was the only way you could really get vehicle transformers during the Beast Wars period. I picked up a few of them just because of that at the time.
KB died because they got bought up by a company that didn't really know how to run a toy store, and had similar problems to Toys R Us: too many locations, in debt to Bain Capital, much smaller business competing against Toys R Us, and then later other retailers. They then sold themselves off to Toys R Us.