Where can I check if an online store is legit?

I'm interested in purchasing some items from an online store that accepts cryptocurrency, but I'm hesitant to do so without first verifying its legitimacy. Can you suggest some reliable methods for checking if an online store is trustworthy? Perhaps there are certain websites or tools I can use to research its reputation, read customer reviews, or confirm its security measures? I'd like to make sure I'm not falling into any scams or putting my personal information and funds at risk.