Spoiler will only help in cosmetic look,not worth spending 3.5k on it.But if you want to freshen up the looks of your car then you can definitely go for it.
LED guard price quoted is too costly, definitely check in the aftermarket for both the products, will be cheaper and better.
The foldable Rear View Camera is good product, but check for the clarity in the video. Also if you go for After-market you can compare the clarity on offer and decide the product.
For all the above products you should visit after-market once to get a better idea.
All the best.