I would say YES!
A 1st Print (Assuming Orange Flyleafs and not white) Players Hand Book (Assuming AD&D and not 3.x Ed or 4th Ed) is easily worth $20 even in Good condition.
I would complain if those pages are torn out and gone though.
If the pages are torn out and present, then I would be fine with the book as is at just $20...
However, if the book was otherwise in Good to Very Good Condition, then the torn out pages (but present) does (
IMO) push the book down to Fair to Good at best.
If those pages are gone, then it is in Poor condition, yet probably still worth 20 bucks for historical value and as a place holder if you do not have another copy... barely...
Based on the title of this thread, I must assume the pages are gone...
So I would probably complain and if I needed to; ask for a full refund including SH charges... BOTH WAYS...