I only have one silver eagle. it's BU 2005 and don't like the way it is too huge for a cardboard 2x2. Any legitimate reasons why I should have it slabbed? (I'm kind of an NGC guy, even though I've never had a coin slabbed. I think my reasoning behind this is a simpler name than PCGS, and sharper lookin slabs )
Do you want the slab just for display purposes only?? If you are just looking for a display, Air-tites has a number of holders or display boxes you might like http://www.air-tites.com/ But if you want the slab for grading, then i guess it's up to you.
You should be able to buy one that is already slabbed for less than the cost of getting yours slabbed.
Here go to this place: http://www.jpscorner.com If you are just looking for a slab they sell empty slabs and you can put the coin in yourself. They have PCGS and ANACS style. As mentioned you will save a lot of money. I think the slabs sell for around $2. IMHO, the coin will look much better in an AirTite holder.