I'm not sure how much I'll be able to fit into a yellow envelope, so just because I list these things doesn't guarantee you'll get them (but please do list the things that you would most want.). But yeah, here's a list. Just a warning I have a horrible memory and might have forgot some of the character names, etc.
From the Shugo Chara series I have - Random Nakayoshi stuff, like a Amu cellphone keychain, notebook, notepad, towel, etc. I also have a Ran keychain, and another keychain of that Chara that looks like an angel. I also have a figurine of that girl-who-ended-up-being-a-guy-whose-name-I-d
From other series - Handmade keychains that I got from some girl on Livejournal ( Durarara [Shizuo and that other dude], Death Note [Matt and L] Hetalia, and some Vocaloid keychains), some nendoroids and figures from Vocaloid and Death Note, although some of the pieces may be missing. I also have a Misa Amane plushie and a Vocaloid cellphone chain.
So yeah if anyone is interested then please just leave a comment! =)