Ok this is kinda embarrassing but I thought It might be useful for others.
I don't have much hair on my back but there are these random hairs that grow in spots that I just can't reach with a razor and it's so little that it would be ridiculous to pay someone to wax my back. I've had this problem for a while and thought to myself someone should invent something to solve this problem, then I thought ...surely someone already has so I searched the internet and found a couple of products.
One was called Razorba....(no I'm not associated with or making any money of off this). It's kind of like a back scratcher but it lets you insert a disposable razor at the end of a handle. It was like 40 bucks on the company website and I was about to order it when i decided to look on Ebay and found it for $19. I got it today and just tried it.
It's awkward to use, but I think with use I'll become more coordinated with it. It did work......just took me a while to figure it out. Overall I'm happy with it...It did what i wanted it to do.
I found another product that is an electric back shaver and I can't remember the name but it is sold at Target. Since I haven't used it I can't really say much, but it looks like it would work.