2. You said:
I am not sure what you are asking b/c there is no rule that any coin ever "SHOULD" be slabbed.Should I have it slabbed anyway with a details grade?
If wanting to sell for profit, then slabbed coins will sometimes bring higher profits in markets where there are a lot of people who only care what the label says without worrying about the coin itself (buy the coin...not the slab!)
Also you must make sure if you do want it slabbed that the price for doing so is going to leave you with profit after you sell. Some places you have to join to use - that's all part of the price to have slabbed. Then there are things such as eBay and Paypal fees that eat into profits. Its a math game.