While the item in the OP is a poor example, it does demonstrates one of the main problems with slabbing (coins/chips/etc...). Believe it or not, there is a small percentage of people that might fall for that scam, as totally sad as it is.
Put the item in a nice presentable package, slap a company name on it that sounds reputable, and uninformed people will believe the item is worth what they say it's worth. Better idea is to take the time to become more informed & educate yourself about the items you are collecting rather than depend on someone else to determine an items worth for you.