Well here it is, my smallish collection. I've now got 20 dreamcasts in total, since taking photos.
To list a few things:
I have 4 new controllers that I had modified into wireless and 2 guns modified to wireless, which work work with modern TV's.
My main Dreamcast has an original gdemu, gdmenu software , 128gb sd card, battery and controller fuse mod. Also have the 3d printed insert with an sd card reader extension. I run a vga cable to a vga to hdmi 4k upscaler. Run in full screen on a 55"LCD. Works perfectly. I think it's the best setup with a gdemu as games are converted to run over vga and the fact the guns have a cable from the controller wireless dongle that connects to vga. So this allows me to be able to use the guns.
I have another original gdemu and one clone as well.
In the photo of games, on the right area sealed games.
I'm sure you can work everything else out