I bought a handbag after reading a reviewer's post. I didn't buy the exact bag the the reviewer talked about, but I did go to the company's website and buy a bag. I would have never known the retailer existed had it not been for the blog post.
Also I'm expecting my first baby in June and I am planning on cloth diapering. I've been reading every cloth diaper review I can get my hands on before choosing a system.
I actually find that I buy more of the products that I do review and if I really love it I do talk about it all the time and I buy them as gifts or other people I know buy them because I talk about them. I also receive emails and comments all the time from my readers that they purchased the product I reviewed and loved them just like I did.
I talk about a product that I review a lot to people outside of my blog. And I would buy a ton more of the stuff that I see reviewed if I had money lol. I'm waiting for my share of the tax return before I go buy some stuff that I have seen reviewed!
I don't have stats either, but I've bought a bunch of stuff from Etsy sellers that I've reviewed or I've come across being reviewed, including a custom made bracelet/earring set for my daughter's 6th birthday.