An old phrase which, I believe, may be timely...

The idea of "buyer beware" is not new, but may be very timely.  Knowledge is our best defense against being fooled/taken/scammed.  

I owned a very high end modern/Scandinavian furniture store for many 
years selling some very famous items, some of which are at MOMA.  

The famous designer "names" are in frequent use on ebay listings 
for poor quality items that have nothing to do do with those designers/architects. 
And the same can be said for Craig'slist and any other "resale" site....and in this 
economy people are selling off much of their expendable possessions. And yes, 
there are names that can be used in audio advertising for products that have 
nothing to do with those "names".   When in doubt, get an opinion from a 
person with knowledge. 

https://en.wikipedia.org/wiki/Caveat_emptor