Who are the most accurate retailers or Ebay sellers of original porcelain signs?

[rfkimba]

Hi Collectors,
There are many  highly knowledgeable sellers of telephone signs  . I have found purchasing from a knowledgeable collector   the best . I am learning which Ebay retailers to avoid sometimes the hard way.
   I also collect other non phone porcelain signs and was hoping to obtain suggestions of retailers, auction houses  or individual Ebay sellers that in the contributors opinion has been very accurate in their sign descriptions and authenticity. I've  had good experience with Morphy auctions and North American for telephone signs.
Any suggestions?
Thanks,
Bob Farber