Perhaps the BEST B1G Forum anywhere, here at College Football Fan Site, CFB51!!!

We went to USC at ND a few years ago,  there's a very healthy ticket resale market in So Bend, meaning supply.  I do wonder if UGA game was a recent exception, as that game seemed to maintain its high premium.   I admit, I misread your original post as someone seeking a single ticket, not single game ticket.

I still love showing up to haggle.

In this digital age I have become more acclimated to buying in advance; I am not sure how big the outdoor market is or will become in the future. That said, there were a lot of tickets for sale on game day morning on StubHub before I left for the the Iowa-Wisconsin game last fall. The market did not drop. I thought the market would precipitously drop that morning. I think I may have bought the tickets that morning on StubHub just before I left on the 2.5 hour drive to the game.
In 1985 I had Iowa season tickets. That was the year Iowa was #1 and met Michigan #2 in Kinnick Stadium. Dad did not have season tickets, and he tailgated with us. He bought a single ticket out front for $10 as we walked into the biggest home game in Iowa football hx. As you say, usually one can score a cheap single even for a big game.

In 1985 I had Iowa season tickets. That was the year Iowa was #1 and met Michigan #2 in Kinnick Stadium. Dad did not have season tickets, and he tailgated with us. He bought a single ticket out front for $10 as we walked into the biggest home game in Iowa football hx. As you say, usually one can score a cheap single even for a big game.

I bought a very good seat outside the stadium that day for a good price.  Was probably only 10 rows up on the sideline
but, I've ALWAYS been lucky

Wow. That's gonna be a huge game.

Does ND typically play the top teams in the Acc as per their arrangement? Or do they mostly load up on a bunch of BC, Syracuse and Pitt?

Speaking of Notre Dame Vs Syracuse, they face each other this coming season at Yankee Stadium. Tickets from the usual resellers start at almost $400!!! What the heck? I’m puzzled as to whether it’s the venue because I attended a game there a few years ago and paid $75 for lower deck seats. Or is it Notre Dame they’re charging for which still doesn’t make sense because I attended one of their higher profile games a few years ago and paid about $80. 
$400!

The market hasn't even started.   Never buy on secondary for a sold out event this far out.  Of course you can and should scout at this point as you never know who looks to dump.

Those $400(!) tickets I was earlier venting about are now down to $85. The Maryland Vs Texas cheapseats starting at $90 are now under $40. But the Virginia Tech @ Old Dominion tickets have held steady at about $175.

I usually buy on StubHub because I used to have to drive a distance and didn't want to take a chance.

I was headed to the ND-UGA game last year and prices kicked off at $400 for bad seats and folks said I should wait.  They went to $700+, so I ended up watching on TV.  ND seems to attract high prices, and Dawg fans were snapping up anything available for that one.

Now I can "afford" to drive to Athens and take a shot with the local vendors.  If I don't snag something I can walk to a bar nearby and do OK.

I may go to a GT game and I figure there would be no problem unless they were hosting a Clemson/FSU/UGA kind of opponent, maybe VT.

Stubhub has been reliable in my experience, though expensive of course.  I got tickets to a UGA game at Ole Miss on the 40 for not much a couple years ago, something like $125 a piece.  The game did not sell out.  That surprised me.