Two stores have just opened pre-orders on a new batch of gcomp and gscart switches, due to ship in March. They’re not cheap at about $300 each, but this is definitely a “get what you pay for” scenario: 8-in, 2-out, auto switching, safe simultaneous output and a long track record of being solid and reliable switches. More info and alternatives below the links:
If you’re on a budget, you can get a cheap 3-in, 1-out component switch for about $25. They’re not very durable and you loose a ton of features…but they’re great to start out and don’t add any interference.
Cheaper SCART switches are harder to find. The Gamescare 8×2 is $100 cheaper, but lacks any of the sync regeneration. The RGC one is 6-in, 1-out and only about $70, but it’s designed for the RetroTINK 5x. It’s still totally compatible with other solutions, but you’ll need to make sure your output solution is compatible – More info in the main post: https://www.retrorgb.com/rgc-scart-switch-reviewed.html
There’s other solutions listed on the SCART Switch page that might fit your setup better, but at the moment, the ones listed here are my favorites: https://www.retrorgb.com/scartswitches.html
UPDATE 12/12: I didn’t realize both Stone Age Gamer and Rondo were opening pre-orders. I just added the new links above.