I like Costco very much, am always looking for opportunity to buy the stock, says Jim Cramer

There is never a good time to buy the great ones. When they're going up, you're chasing. When they're going down, you're buying into a value trap or you're trying to catch a falling knife.Look, that's that's how so much of Wall Street sees this job. If you buy it anytime, it's probably going to be the wrong time. But on a day where we hit some more records, Dow gaining 192 points has to be advancing 27% and the Nasdaq edging up ever so slightly 0.09%.I think we have to try to distinguish between stocks that ...