It arrived.
For Cart Flasher for GameBoy
I did receive the Cart Flasher in the mail, but the provided documentation was not enough for me to be able to get the device to work with Windows 10. I attempted to contact the seller about my inability to set up the device, but as of this point, have not received a response. It now sits on my desk, awaiting its potential functionality.
After independent experimentation, I was able to get the device working with Windows 10. It involved searching for GB Cart Flasher 1.1 and a lot of fiddling with drivers, but eventually it was fully compatible with backing up and restoring save files, and backing up ROMS, off of retail carts. When combined with the RTC flash cartridge sold by this retailer, I had full compatibility with any game tested.