I bought mine on eBay. They are on Amazon.com also, but the price was cheaper on eBay and the product brand new there as well, so I bid and got it for $65 instead of the $99 I was seeing other places. I didn't mind saving the $$. LOL!
Moya, I bought a GroVert vertical garden and it was VERY easy to work with. I have just planted it this past weekend. I don't know how well I'll do keeping it alive yet, but putting it together was just the easiest. I chose succulents because they are easy for me to keep alive in container gardens so I thought I would do well with them in the vertical garden. We will see. :)