Polo eBay finds/marketplace

all it's serving to do is segregate beginners from other players more, making the barrier bigger, etc.

That's very dramatic.

They're different needs, it makes sense.

And why would more established people want an influx of stuff they're not interested in?

Also, why is it called "Beginners Polo Forum /" Is it a new forum?

Not a new forum, no, it means 'forum finds'.