DetectingWales.com

Here's a link to the list of all know ebayers that have been known to sell fake coins/artefacts on ebay.
http://www.forumancientcoins.com/board/index.php?topic=18502.0 (http://www.forumancientcoins.com/board/index.php?topic=18502.0)

This link shows fake coins and how they are created and how to spot them
http://www.forumancientcoins.com/fakes/index.php (http://www.forumancientcoins.com/fakes/index.php)

Thanks for the link Simon, very interesting mate , it would be hard to tell the difference, the copies are done so well, great info mate 
Cheers Ace  ;)

Some more great links Simon. Have not bought of Ebay but have been tempted lately but more for equipment rather than artefacts

There is also a site that you can buy copies from I will try to find it and post the link on here
debs ???

Any of these Debs?

http://www.dorchesters.com/coins/reproduction_celtic_coins.htm (http://www.dorchesters.com/coins/reproduction_celtic_coins.htm)
http://www.by-the-sword.com/acatalog/Coins.html (http://www.by-the-sword.com/acatalog/Coins.html)
http://excalibur.bnp.org.uk/acatalog/Historical_Reproduction_Coins.html (http://excalibur.bnp.org.uk/acatalog/Historical_Reproduction_Coins.html)

No
SimonH I cant remember where I saw it but if I find it then I will post the link
Debs

That is a terrific post.  Looking through the list, I bought a coin off one of those dealers for someones Xmas pressie.  i am going to ask for a careful look at it.