Jim Cramer says he is unfazed by Costco's recent sell-off. Here’s what he’d do with the stock

Shares of Costco have gone on sale — and now investors are getting a rare buying opportunity, according to Jim Cramer. “For much of the past few years as the market churned higher, it often felt like you never got a chance to buy the best stocks on weakness,” Cramer said Monday night on “Mad Money.” “Now you’re getting that opportunity because the sell-off has been incredibly indiscriminate, taking down the good with the bad.” Costco fits that bill perfectly. Cramer’s Charitable Trust, the portfolio used by the CNBC Investing Club, has owned a position in Costco for years. However,…