Official Merchandise?
 

It is difficult to tell sometimes what's official and what isn't without actually seeing the product, a goood indicator is if you can see the "(C) Neverland Entertainment Inc" statement on it.

Neverland Entertainment is meat's official licensing compnay for merchandise etc.

I've seen the stamps on Ebay before now and they're not official as far as I can tell, I'm sure they're not even actually valid postage stamps, but sometimes the non-official things are noce to have in the collection. End of the day what you want to collect is you call, some of the nicest bits in my collection are not necessarily official items.

What Andy sais is all true, just want to add a small note.

I know in some countries it was possible for people to get customised stamps from their official post office. Customers could bring images for the stamps and receive a few sheets. Thise stamps may be used on letters and packages.

This means they are valid post stamps and unique in their own way. I haven't seen these stamps and I have no clue if they are something like the customised stamps.

But it doesn't make it official merchandise and it depends on how far your collecting hobby goes ;)

Too far, wayyyyy too far

i think the bootleg tshirts are awesome. id highly suggest wearing one to a meet & greet. its a blast seeing his reaction.