I don't expect a lot for a buck. Can't buy a bottle of Mt. Dew or a cup of coffee for a buck anymore. But you can buy a class.
This is the classic "1st Edition" class for Labyrinth Lord, but should be compatible with any number of other Old School RPGs.
You get a cover page (oddly formatted, but hey), fours pages of the class and the OGL statement.
The class has what you would expect, tables for advancement and assassinations. Also there is a bit on the use of poisons.
There are, unfortunely a few things missing.
In the missing must haves there is no saving throw advancement tables and no to hit advancement tables.
In the missing like to haves there is nothing on new weapons unique to the assassin. Nothing for example about the garrote, the time honored classic of all assassin weapons. This is almost a missing "must have" to be honest.
Also in there is no Labyrinth Lord compatibly license statement. I am not sure if it needs one, but I could have sworn that there should have been one.
So it has a lot of potential, but the publisher really needs to fix these omissions.