CPilko, I would also highly recommend the Spider-Man Epic Collections. That may be what the person from the store was talking about, since the Epic Collection line is brand new. The plan is to collect in large, reasonably priced, colored trade paperbacks the entire 20th century runs for Marvel's most iconic titles and characters, Amazing Spider-Man included. They are released in uneven order, though, to benefit longtime readers who might not own certain rare story arcs. Eventually, like I said before, you'll have the entire Amazing Spider-Man run in a large collection of paperback volumes. They're great! I own quite a number of them and they're top-notch and very high quality.
Currently the Spider-Man collections available are:
That first one is
highly recommended for anyone interested in Spider-Man; full color art of Amazing Fantasy #15 (first appearance of Spider-Man) and Amazing Spider-Man #1-17 and Annual #1 by Stan Lee and Steve Ditko. Basically, Spider-Man's origin story and his time in high school meeting all his most famous villains. Pure gold.
"Ghosts of the Past" is also great. It takes place right after he loses the alien symbiote costume and covers great stories like the Hobgoblin's return, Spider-Man getting caught with his mask off, and the return to a cloth version of the alien costume.
"Cosmic Adventures" is really good, probably the last great story before the end of the "classic" Spidey era. During the famous "Acts of Vengeance" crossover/event in the Marvel Universe, Spider-Man gains all new superpowers during an astrophysics experiment, basically making him Captain Universe.
"Round Robin" is probably my least favorite of the volumes but still worth getting. He's lost his new superpowers and teams up with a lot of other Marvel superheroes.