I purchased my extend and climb on ebay from an Ace hardware store, it may have been Lozon Ace Hardware or something like that, I think I paid $165 with free shipping, cant remember for sure.
I chose the extend and climb because I was told the telesteps has to be opened all the way up before you can lower it to the height you need(dont know if thats true, but thats what I was told).
I can open my extend and climb just as far as I need it, and lower it and raise it from there. I like the locking - unlocking mechanism, its light weight, and customers love it and ask all kinds of questions about it. I keep it as my “clean” ladder for inside homes. Compact so it fits right inside my truck behind the seat, out of the elements.
Hope this helps,