Well you can sure give a report on an item and give its detail and such and advise people not to buy His items, being there inaccurate, poor contruction etc.
There are to many bad prop sellers out there and they shame the good ones. If enough info is out on the people that sell decent props they will get more bussiness and thrive and get a bigger name and you wont have to worry about getting crap.
I know what is what happened to me before I found this place I had sintra armor from Ebay sellers and whatnot, but I have just about bought everything all over agian because when I seen peoples work here it was cheaper, better made and the people selling it will make it right if something goes wrong.