I say its 530 you don't close until 6.
I respectfully have to say I think you're mistaken. I'm 90% sure collectors always closes at 5:30 on Tuesday. I know the hours well as it's on the way home from work and I know I have to leave early if it's M-W as they close at 5:30.
In any case, I really like this shop. I'm into Mausers and S&W revolvers and they have more than most shops.