Preliminary market data on the "+"

So the plus designation has been out for a few months and a few have come to market since. I dont follow every series to see how they have done. Anyone have an idea of how this will continue to play out?
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Successful Trades: Swampboy,
I just got my grades on some coin's i sent in to pcgs and got a AU58+ on a 1910 $10 Indian,
I think that's the first + i have seen on a coin less then MS.
New collectors, please educate yourself before spending money on coins; there are people who believe that using numismatic knowledge to rip the naïve is what this hobby is all about.
<< <i>Welcome, waynembx! >>
Thanks,
Started buying,collecting and selling coins when i was about 10 years old(39 years ago)
I started out by selling wheat heads to my 5th grade school teacher.
I don't sell very much but i have always loved my coins,currency and stamps and in that order.
I been reading this site for years and just joined up.
Also belong to PMG as i collect U.S Currency also.
And i have collected US stamps on and off for just as long.
<< <i>There were a few Morgans on TT last night, they were common dates graded 65+ and brought $40-60 premium I believe. >>
Is that really a premiun or just a refletion of the cost of the Secure+ grading fees added on?