Yep. The OA market is small, and quirky. A few deep pocket (or obsessed) collectors can distort the market. Their preferences can drive prices. Sometimes, the rest of the hobby agrees and that particular art segment takes off. Other times, it's artificial. I think run of the mill Romtia Spidey Art falls into the latter category, to be honest. Yes, some important pages and covers in that run are iconic and deserve their value. But, a lot of that stuff is not that good, and doesn't deserve the elevated pricing it gets. IMHO, anyway. I think it's being propped up by a few zealous collectors.
There are some OA trends I just don't get. Herb Trimpe Hulk pages, is one of them. That, IMHO, is SOLELY due to the fact he was the first to draw Wolverine for publication, and that 1st appearance page went for so much. It drove collector interest in Trimpe Hulk stuff.
I'm not interested in his stuff at all, with some limited exceptions. I'd love to get my hands on a Godzilla page from his run on that book at Marvel. Not because I love Trimpe art, but because I loved that Godzilla run.
Those pages are hard to find in the wild. But, if anyone has one they want to sell, PM me! I'll look at it!