"Brilliant Uncirculated" 2008 and prior 1oz $100 Platinum Eagle, PCGS or NGC?

NGC is cheaper, and the coins rated tend to cost more for some reason (IDK why) but PCGS is offering to rate 8 of my best coins for $200, and that equals out the cost...

Also, Being uncirculated, what kind of rating can I expect (hoping for at least MS-69)?

Coin cost me 1800, basically 260 over ask for 1oz .9995 fine Pt. I have a bunch of gold bullion that I'm tempted to sell (Scotia Moccotia and PAMP SUISSE, w/ assay cards)... should I keep the gold or sell it and buy a couple 1/10oz $10 Eagles, assuming it gets rated well.?


Also, I have an 1884-philly and 1885-philly morgans, and a 1927 philly Peace Silver dollars... the Morgans are MS-62-68 IMHO (a few scratches, by ut all features are present and relief is good. The piece is probably VG-VF. I also have a few hundred mercury dimes I have a book with every mint, and I have about 60% but only a few rare ones... mostly 1927-1943, and I still have 2 rolls of extras. Should I work on completing my dime collection or buy more Pt. coins/bullion? How much would a complete mercury dime collection be worth today? I can't afford the 1916-S so it's kinda futile... but IDK maybe somebody with just that coin would be interested in every other?


First post, bear with me if I sound dumb I don't pretend to be very knowledgeable.

-tdr