James aka Saint from RetroHQ has just opened pre-orders on the Jaguar GD ROM cart. The price is £151.00, which came out to about $190 after shipping: https://new.retrohq.co.uk/shop/atari-jaguar-sd-flash-cartridge
There’s been a Jaguar flash cart available for a few years called the Skunkboard, but this is more desirable for many reasons. First and foremost, the Skunkboard only allows you to flash one or two games at a time…and would require the Jaguar powered on and a USB cable connecting the Skunkboard to a PC. To top it off, you’d then need to flash the games using a command prompt, as the GUI was buggy with current versions of Windows. Clearly more of a “developer tool” than a ROM cart.
Alternatively, the JagGD works like a typical ROM cart and allows you to load a full set of games on an SD card and play from there. There’s also support for more homebrew games and eventual support for JagCD games as well!