I already checked the user's reputation and yes, is not that great, but, checking his feedback, he has no negative comments as a seller... Is pretty weird...
Ratiocinator, about trading, i think that i'd rather buy them from you since i don't have any of the items you mention... Honestly my collection (compared with the other collectors in the forum) is quite small and simple... Here's a little summary of it:
Silent Hill: PS One US, PS One UK and PS One JP, all of them black label versions. Silent Hill: Original Soundtracks, unfortunately it's a Taiwan Bootleg... PS One UK Demo (SLED-01735) Which i guess i would be willing to trade.
Silent Hill 2:
PS2 US Black Label, PS2 US Greatest Hits Factory Sealed. PS2 UK Black Label with Making of DVD. Silent Hill 2: Original Soundtracks (Konami KMCA-120)
Silent Hill 3: PS2 US. Lost Memories DVD. Silent Hill 3: Original Soundtracks (Konami KOLA 038)
Silent Hill 4: Original Soundtracks Factory Sealed (Konami LC 1292-93)
Silent Hill: Origins: PS2 US, PSP JP Factory Sealed with Crystal Art Butcher. Silent Hill: Zero Original Soundtracks (Konami LC 1627) with Konamistyle porta MP3 player.
Silent Hill Film: American and Latinamerican DVD's and the promotional news paper.
Silent Hill: Homecoming: PS3 US, framed official poster, limited edition US soundtrack.
Silent Hill: Shattered Memories limited US soundtrack which i could trade too, and the official poster.
3 comics and... Maybe i'm forgetting something... Oh yes, a custom t shirt!