Well the yoke didn't fall out, just the wedges. they keep the yoke aligned. It didn't look bad on a movies but anything with straight lines looked horrible. I'd say someone either dropped it or got rough with it. This one doesn't do RGB, wish it did. It does component\composite\svideo. Lucky I have a Sony PVM for RGB.I've got a Sony Triniton CRT myself which I use for old school RGB gaming. They're great.
Though with damage like that, I'm surprised you didn't get it for free. Wonder what could've caused the yoke to fall out.