Could it be that they have a large inventory because they actually take in the classic games on trade unlike most places. And since you hardly go in there how do you know how much of their inventory moves. I have been in the store and seen people bring in 100+ games, multiple systems and accessories for trade or sale. I have also seen people leave with 20+ games at one time, so I guess their inventory is moving just might not look like it to you since you rarely go in there.
And you complain about therer pricing, last year I traded over 130 ps2 and ps1 games. I was able to get a new 360, 15 games, several of the rare you cited as being to much and well over 300 dollars in cash. So yeah I would like to see you do that elsewhere. As to Rhino games keeping the Cavern's prices in check, I don't know if you realize Rhino prices on the classics was just like Gamestops and always higher than the caverns until they clearenced it all out.
As a matter of fact rare ps1 games were still more at Rhino in its hayday then most are at the Cavern now. It is in your right to not like someplace, but to bash it and make others decide not to go there because of you opinion kinda sucks. Like the other poster said if you don't like it or the staff stay away. I'm sure with the attitude you've shown about the store here you probably deserved some attitude if you have gotton any.
Also if the employees have been rude to you why don't you speak with the manager about it. The only way the issues can be corrected is if the management knows that there is an issue. I know he will be in the store all day Friday.