Also, the cheap options are using off-the-shelf upscaler chips that will choke on anything other than NTSC or PAL video baseband - the kind of chips that go into TVs that have retro inputs. As far as I'm aware there is no chip on the market that you can buy that will handle arbitrary analog video modes to the fidelity that we want them, and pretty much everyone is using some amount of FPGAs to handle some part of the conversion[0]. That's like half the BOM cost on these things alone.
[0] Don't ask me how much. I imagine you probably couldn't directly sample analog video on an FPGA.
For home computers like c64 and amiga that'll be enough though. They were TV based. I didn't realise this was that expensive. Probably will go for a Chinese option then as they're only 20 bucks.
I thought that at first. But if you need to translate between a lot of the devices this would work with, you might spend more than that on all the different adapters.
For someone with a lot of retro gear mixed in with new gear (like me), it's probably not such a bad price. Especially businesses that digitize home videos etc.
I wonder if there is surge control on the inputs. The number one reason I have to replace video adapters is the input buffer frying. Ironically that often results in a not-blue screen of death.