Am I missing any potential auction sites/dealers of modern PCGS coins?

My children are trying to complete their birth year proof/mint Registry sets. We search the BST, eBay, Teletrade and Heritage. Are we missing any auction/dealers that might be a good source for high-grade modern PCGS coins?
WANTED: Cincinnati Reds TEAM Cards
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Comments
Have you tried making a want list and posting on the bst?
original mint packages?
for children, may be more educational.
<< <i>why not the ungraded
original mint packages?
for children, may be more educational. >>
They're collecting their birth year sets in PCGS slabs. We're only missing 12 of the 76 coins (2 proof sets of 17 each and 2 mint sets of 20/22) and are keeping an eye out to upgrade 24 of the 76 (the other 52 are top pops). They inherited the collecting gene from me, so they enjoy the hunt.
<< <i>moderncoinmart.com might have something.
Have you tried making a want list and posting on the bst? >>
I searched moderncoinmart.com, nothing at this time. Thanks for the lead!
We have our current want list on the BST.
<< <i>You might check here, too: Collectors Corner >>
Mark,
Thanks! 93 coins were listed, regretfully none were on our want list. I'll keep checking the site from time-to-time.
Larry
<< <i>I looked at your want list on the bst then looked at teletrade.com and found a few in upcoming auctions. >>
Placid,
Thanks! I don't see any from our want list on Teletrade. Maybe my search criteria isn't capturing all the coins?
Larry
1999-S 25c Delaware Silver PR70DC
1999-S 25c Pennsylvania Silver PR70DC
Teletrade.
1999S Proof Delaware PCGS 70 DCAM
1999S Proof Pennsylvania PCGS 70 DCAM
I put in the search 1999 and pcgs and all denomintaions.
If they dont have what you want you can make a wantlist there and they will email you if/when the coins are at auction.
I see you want silver ones so maybe those are not what you are lookng for. I dont collect the state quarters so didnt really pay close enough attention to that.
They might have more I just didnt look for everything.
Thanks!
Larry