>>23360997trial decks at best have a couple of rare cards and are centered around a generation. they come with a mat for card placement and a rule book.
first load of booster packs had the signed cards in it but those are the SSSR ones and finding one at this point is nearly impossible.
holofes boosters don't have signed ones as far as i understand but have a different SSSR type where they are holographic and have a giant diamond in the background.