Sometimes the publisher will make a conducting score that is condensed in one of two ways:
A) The tace parts are left off and the remaining staves come together to form a smaller \'ensemble\' for when the full orchestra isn\'t needed (i.e. you jump from a tutti orchestra to just strings and horns on the next page, so the score shrinks to reflect that). This make it a little easier on the eyes while in the middle of a concert, though some conducter\'s prefer the full score.
B) The shrink score, in that a predetermined set of anywhere from 3-8 staves is chosen. There will always be that number of staves and all of the parts are represented in that small of a space (i.e. melody on staff 1 played by XXX instruments, harmony 1 on staff 2 played by XXX instruments, etc.). This is nice for marches and the like, but incredibly hard to pinpoint parts on, as sometimes non-essential parts are often left off.
The Full Orchestral score is just that -- you the see the full orchestra the entire time on every page. These are designed for recitals and the like, though a lot of conducter\'s like the have these in the concert for the final performance.
Symphonic Suite is usually a full orchestral (or full wind ensemble) score. Almost all include all of the movements of the suite in one score, though I have seen a few that separate the movements into separate books (Johan de Meij\'s Lord of the Rings Symphony comes to mind). For $500 that sounds like the full orchestral package -- parts for every instrument including two copies of the full score. I could be wrong, though, what piece was it?