New to auction houses - REA auction, low bids?

[Rhotchkiss]

I had about 20 initial bids in, but bid on nothing last night.

I was watching 4 cards, specifically. Three went for about what I expected them to go for and one was a steal. I was watching the Willard's Chocolate Ruth, the M101-5 Thorpe, and E90-1 Speaker (hot card now, about time). They all went for about what I would have expected, perhaps a little underwhelming if anything. However, in my opinion, the 1907 Dietsche Cobb SGC 3 was a steal at $9,300.

The one card that really struck me is the T206 O'Hara Polar Bear PSA 4. It closed at $25.2k, which confirms an 8/14 sale of the same grade at the same price (REA too), and shows a major increase in value in the last 4 months since the same exact card sold in Heritage in May of 2022. O'hara PB up $10k, 67%, in 4 months? Why is that? I notice Demmitt is way up too, Do you think everyone is scrambling to get to 520 and they are getting in on these two, since they are "tougher"?