Is there any guarantee all of script work or not? have you checked it or same as satoshibox?
The ones that I specifically reference here I have checked. If you have a question about a specific script, PM me and I will take a look for you. Your best bet is to contact the sellers directly and have them show you a working demo of whatever you want to buy, and have them prove they own it by asking them to upload a text file to the server or something similar.