can i make the items in my shop transparent if so how

Try CSS Help's Site! (http://www.neopets.com/~csshelp) ! It gives you that code I believe as well as many others for jazzing up your shop!

thats no possible, the neopets staff do not really like people to tamper with the items in the shop...

There really isn't any code to make items transparent. Some items already are transparent, and when a darker background is put behind them, this becomes apparent. Otherwise, like thejermyn said, it's best not to tamper with shop items, as it may result in you being frozen.

I hope this helps. Have a nice day! :)