I have 2x Extremely Heavy Duty extending Arms available for use with 33" - 60" TV's. They are brand new, never been used at all. The box is slightly tatty in each of them, but I'd imagine you'd throw away afterwards.
I must stress that I have just the arms for sale, and YOU WILL NEED ONE OF THESE ITEMS AS WELL: (THE ACTUAL BRACKET FOR THE TV)
Ebay Item number: 360000031586
Ebay Item number: 150059642997
Here is a scan of the instructions:http://img227.imageshack.us/img227/7518/lastscansl5.jpg
As can be seen, you need to use this with PLB-1 or PLB-2 or PLB-3 or PLB-4.
The arm folds flat on the wall when you want to keep the TV just on the wall. I have mine set up with a Technosonic from Woolworths. I can provide more pictures if you wish.
The arm comes with a set of screws, though I think these are the screws to go into the back of the brackets that you must buy (see above). The wall fixings come with the other bracket (it's been a while sorry since I installed mine).
I'm not an expert, so I can't offer technical support but if there is anything I can do to help (and of course, I'm not responsible for your installation :)
Looking for £50 each delivered by SWIFT courier as Royal Mail will charge an arm (pun intended) and a leg for something this heavy - they are very, very heavy.
Thanks, any questions, fire away.