my very first slab was this a good purchase or waste of money http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270436498018&autorefresh=true
If you are asking if you got a good deal, I would say that depends on whether or not you like the coin. I will say this, you will probably never sell this coin for a profit as it is an ultra common coin in this grade. The total MS64 population is (152845 / 114093). Personally, I don't like the 1881-S blast white unless it is in premium gem status. They are just too common. You can pickup an MS66 for about $250 which I still think is overpriced given the population of (23883 / 4540). Here is an example of an MS66 1881-S Morgan: I believe I paid $250 for it a few years ago.
I think that was a pretty good deal, especially when it comes to educating yourself, you now have a tpg assigned slab, you can study it, compare it to other coins, and it will help you in grading coins in the future, I know you can do that on line but having the coin in hand is much better for assessing condition.
Decent purchase, I am a fan of common date slabbed Morgans. Collect what you like and enjoy the hobby.
Really nice first slab. I bought my first slab a couple weeks into the hobby a few years ago. It was an SGS slab... I keep it to remind myself...