I have had this happen a number of times.
Then I look them up and they're just getting started or there's not necessarily the credibility.
But then a few contacted me, even magazines, and it was hit or miss.
"Oh, we didn't use your product in this issue because we'd passed the deadline", etc. Not my fault they contacted me too late.
But didn't make it in for the issue, and I was out the product price, etc.
It's difficult to decide sometimes but I just wing it. If there's a chance but they don't look like they have too many under their belt then I ask them to purchase to try it. They can still write the review
when in doubt just ask the to buy one. Offer to post the link to promote their site after they purchase yours and put up a display. Trade