• A guy at work got a different brand off of ebay, and, though it's different in form and appearance, it appears to be made from the same camera and the internal electronics is likely the same stuff (probably developed under a program of the Chinese government for Chinese companies to purchase the guts and incorporate into their own designs) as the operation, wifi, focal distance range, and picture specs and quality appear to be identical. One difference is that the Depstech has a "semirigid" cable, and my co-worker's is not simi-rigid - it's fairly flexible/floppy. I see the semi-rigid as being much preferred, because in situations that you have to extend it (into a pipe, duct, wall, etc.) and can't hold the tip in your hand, you would have little to no control in guiding the tip position and angle.
• Came across this one on Amazon last night: https://www.amazon.com/Depstech-Semi...wifi+endoscope
Besides that cable being blue, it's focal distance is up to 15" (all the others are in the 1 to 3" range). I can see advantages to that. But at over $50, I won't be buying the second one any time soon. As I said earlier, mine works Ok beyond 3", though the picture quality gets fuzzy - you can make out main features, but not much detail. 1" to 3" is very clear. Oh wait - the blue one has a min. focal distance same as mine, so - yeah - I could see it being more universal. If I hadn't already bought the one I have, I might prefer that one, though it does cost more.
• There's the pretty yellow one which has a larger battery, the standard 1" to 3" focal distance: https://www.amazon.com/Depstech-Semi...wifi+endoscope
That's a non-issue for me, as you can run it indefinitely hooked up to any USB charger. It comes in choice of 3.5m @$43 and 5m @$40 compared to 10m for most of these things. Probably not a big discriminator for me, as I don't see needing beyond a few meters anyway.
• I bought the Depstech carry case @$16: https://www.amazon.com/Depstech-Endo...wifi+endoscope
It's actually pretty nice and packs the endoscope perfectly and compactly. Without it, I could see storage being a pain and higher chance of damage from catching on stuff or just getting hit.
There's another brand case for $14 (https://www.amazon.com/Professional-...NV91QVCJM0FF7X
), but I liked the description of the one I got a little better, and for the $2 difference in price, I'm happy with the Depstech one.