My unit also came without any plastic wrap or screen protectors on the unit. This is my first GPS purchase so I don't know how they're usually packaged.
Purchased on-line a Garmin 50 (non-Life Time Map) from Walmart. It was shipped / delivered with No "plastic wrap or screen protectors on the unit". It would appear this is the normal "Retail Packaging" for Garmin.
I also purchased this deal (Garmin 50LM) ... so I will be returning the unit purchased from Walmart.