As of today, I have around 250 +/- slabs. 90% of them are PCGS, and the others are NGC, ICG and ANACS. Many times, I have broken coins out from other slabs and "crossed" them to PCGS holders.
Why? All things being equal, I know that
IF I had to sell or liquidate my collection, I
KNOW that I will obtain higher prices for my coins slabbed in the top
TPG's like PCGS. Even after my purchase price, submission costs, S&H, etc., I have many times made out with these cross-over submissions.
After all, if you were to buy a coin sight-unseen (like
ebay) and the seller stated he had a 1909-S VDB in "x" condition, would you trust him? I wouldn't. But all things being equal, if the seller had it slabbed/certified with a
TPG like PCGS, buyers would feel more confident in bidding/buying your coin...hence higher prices realized. Take a raw coin to a dealer (not all of them, but many, none the less). You really think the coin is a MS65. The dealer may think it is a MS63, maybe 64 tops. Now you have a problem.
Of course, if that same dealer is selling the coin, he may sell it at a 65 and you think it is a 63.
Look, we are all temporary custodians of our coins. 99% of them will out live us and I want to make sure my collection is protected, perserved, authenticated (especially for keys and high MS grades) and as "liquid" as possible.
When I am buying, I don't mind adding $20 to the cost of a coin if it is slabbed with a top
TPG. I figure for $20 over and above the bid price, it is the peace of mind knowing what I am
getting/buying. When I submit, I submit coins in my raw collection that are worth at least $100 or more.
I would say that about 60% of my collection is raw (like my beloved Lincolns in Intecept Shield 2x2's before 1945) with the other 40% (250 +/-) are slabbed, protected, authenticated and set up for quick presentation and sale.
With that, I even have a letter in my safe stating, "So you found my coin collection...now here's what you SHOULD do!"