There aren't any apart from the Tamron AF 18-200mm f/3.5-6.3 Di III VC which is about £500 if you can actually find it. This Sony is not bad at all for the price, very compact and nicely made too. The best all rounder zoom for the aps-c Sony's IMO is the SELP 18-105 mm F4.0 Zoom G which is a deal of the day on Amazon £339 after cash back.
not good for full frame unfortunately
Any independent maker (Sigma, Tamron, etc) with a lens around this price you'd recommend as an alternate? Doesn't have to be this exact focal length.
But on ebay you're buying it from some bloke who can't supply warranty cover, rather than a reputable seller. He might have good feedback, but that won't help you if the lens breaks down. Think I'd spend the extra £19 for peace of mind.
Same lens. Just cheaper from a smaller seller, maybe trying to get rid of stock.