I do like collecting as well. I may end-up doing the same thing
There is a lot of cool stuff sold here:
https://bitcointalk.org/index.php?board=51.0Always check the sellers trust rating.
I suggest you use escrow until you know some trusted dealers.
Here is the community official escrow list:
https://bitcointalk.org/index.php?topic=108716.0I can personal recommend:
PsychoticBoy
SebastianJu
DannyHamilton
Tomatocage
(there is many other good escrows)
Just send the escrow a PM if you have a pending sale, they will help you.
Also, beware of scammers, unfortunately there is a lot of scammers.
Most popular scam these days is to impersonate a seller or trusted member by slightly change the user name or add "`" before or after the name.
So always double check that you got the right guy.
Look at this guy, a trusted coin trader:
https://bitcointalk.org/index.php?action=profile;u=134378This is an impostor:
https://bitcointalk.org/index.php?action=profile;u=335426But don't get scared away be these lame scammers, If you only send funds to a trusted escrow, then should you be good.
I would not hesitate to send thousands of dollars to any of the escrows I have mentioned, they will not scam you.