Second-Hand Items for Product Reviews
When writing a product review, it isn't absolutely necessary to actually own the item. What we can do, is curate all the information from various sites, having read other people's reviews and essentially bring them all in one place for your potential customer, written in your own words.
However, it can be seen as more credible if you do actually own the item and have personal experience of using it. This can be expensive, if you are having to buy each product that you wish to review.
But who says it has to be new? Why not buy second-hand items from charity shops? Or yard sales? You can then take your own photographs, no problems worrying about copyright, and if you're not shy, add a picture of yourself holding the item. Instant credibility! It doesn't matter that its not in its packaging, because its shows you have been using it!
And then, once you have written your review, sell the product on again! You might even make an extra profit!
You could even borrow products from family and friends. Next time you are visiting, take a sneaky look around to see if they have anything related to your niche which you could review.