Reddit mentions of Action Replay 4M Plus - Ultimate enhancement for your Saturn console

https://www.amazon.com/Datel-Action-Replay-4M-Plus-enhancement/dp/B008FPMBNG

Do yourself a favor and pick up this ram cart for the Saturn. Its 30 bucks with prime shipping and it has the 4 mb ram expansion (certain games require it) and it allows you to play Japanese games which is a HUGE market of extra games. Even if you dont speak Japanese, a lot of games such as fighters and shmups are pretty simple to go through.

As for the game and price I am jealous. Ive been wanting guardian heroes for the Saturn, and you got it for a fantastic price. Saturn is a really fun system to collect for, Its just pricy.

https://www.amazon.com/Action-Replay-4M-Plus-enhancement-sega/dp/B008FPMBNG

Yes, but it does have a cartridge slot on the back. So someone made a cartridge that allows you to boot import games: https://www.amazon.com/Action-Replay-4M-Plus-enhancement-sega/dp/B008FPMBNG

This one: https://www.amazon.com/gp/product/B008FPMBNG/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

If you have a Saturn system already all you really need is this to play those Saturn titles.

https://www.amazon.com/Action-Replay-4M-Plus-enhancement-sega/dp/B008FPMBNG

For all your import Sega Saturn needs

Yes if you have something like this.

There are still brand new ones available for sale on Amazon.

Don't forget a way to play imports I'd recommend the Action Replay for the Sega Saturn. Also is a memory card of sorts and lets you play the awesome 1 meg or 4 meg ram games. The ram cart only import games include fighters from snk and capcom, which are nearly arcade perfect. The only other way to make a saturn region free is by installing a region free switch

Import games are relatively cheap. Probably cause in Japan the Saturn saw much more success. So provided you are good with import gaming it’s worth it in my opinion. Just be sure to get one of these .

Edit: I should specify. Import versions of games that were released here tend to be a lot cheaper comparatively. Games that are exclusively imports will probably still fetch a large price.

I use this 4-in-1 For that you need to do one disk swap to reflash the cart with pseudosaturn, but then you can play imports and back-ups. it's not hard to do yourself and you may save some cash

I haven't had any issues on my japanese saturn playing backups imports or US games with that method. (I have played Panzer Dragoon Zwei and legend this way) The switch on the one you linked sounds cool for switching between the ram modes, but very few games would need you to be able to do that.