Shouldn’t be, they just put out a new printing of it this year!
You can also go for the Mighty Marvel Masterworks if you want. Plus I have to say the paper quality is actually pretty good compared to most of their other editions. Plus I think the Cho covers are really good:
Marvel has been reprinting Marvel Masterworks, but the first Spider-Man one, it’s cheap and it’s and very first couple issues of Spider-Man ever.
Mighty Marvel Masterworks: The Amazing Spider-Man vol. 1
Reprints the first 10 issues from 1962-1963. It's Manga-sized dimensions. This is Marvel's new Masterworks for Kids line, basically. They're cheap, they're built for kids, this may be a good bet.
Marvel has been doing a Mighty Marvel Masterworks GN-TPB line.
I really like Spider-man, but mostly stuff before the Clone Saga (1996). One good thing about those older stories is they are a lot shorter/more self contained, so you don't really have to read them in a particular order.
If you can find any collections of Spider-man by Stan Lee and Steve Ditko, those are the original stories from the 1960s. A lot of those collections are expensive if you look for them used, but it looks like they are releasing a cheap collection with the first 10 issues in June
Don't be afraid to buy actual comics rather than collected editions... use the marvel fan wiki to look for issues you might like, then buy them on ebay, mycomicshop, or your local comic book store.
My favorite run of Spider-man is Spectacular Spider-man 178-200 by Buscema and DeMatteis. Another good run is Amazing Spider-man 200 and the 10 or so issues leading up to it, it was reprinted in "Spider-man vs the Burglar" which is unfortunately very expensive right now.
The Epic Collections are a great format, but it seems like they go out of print quick and then get pricey. Goblin's Last Stand would be a good one to start with that is still in print, has pretty much THE classic Spider-man story in it.
tl;dr I would get Goblin's Last Stand, then the Masterwork edition I linked to above when it comes out.
The early issues by Stan Lee and Steve Ditko are great. This edition that comes out next month not only has his origin story but introduces Dr. Octopus, Vulture, Sandman, Lizard, and Electro.