I know all too well. But, as the Paypal compliance department has told me umpteen times, their policies are not the same and are under different laws. So, eBay will let you list any physical good you want that conforms to their policy (basically anything that's not guns or child porn and things like that). Paypal will not you accept payment for anything that they define which contains e-currency (bitcoins, litecoins, etc), including Casascius coins and the like.