BTW, for anyone who wants to experiment with adding a wide variety of .deb repositories (that is, for anyone who makes assiduous backups):
https://sites.google.com/site/mydebiansourceslist/Home
I remember trading info on obscure .deb repos with Craig years before he started this page. Now I find he has certainly the most informative single resource for .debs on the net. Also, I am certain Craig would be interested to here of more repos. (Knoppix is on there.)
1TB/2TB USB 3.0 Flash Drive Thumb U Disk Memory Stick Pen PC Laptop Storage lot
$80.39
SanDisk 1TB Extreme microSDXC UHS-I Memory Card - SDSQXAV-1T00-GN6MA
$99.99
SAMSUNG SM961 SERIES 1TB MLC PCIE 3.0 X4 NVME M.2 2280 INTERNAL SSD | MZ-VKW1T00
$64.99
Type C USB 3.0 Flash Drive Thumb Drive Memory Stick for PC Laptop 1TB 2TB lot
$73.29
Western Digital WD Blue SN580 1TB M.2 NVMe Internal SSD (WDS100T3B0E)
$46.99
1TB Samsung 850 Pro Series 2.5" SATA 3 SSD MZ-7KE1T0BW HDD hard drive MZ-7KE1T0
$59.99
Patriot P210 128GB 256GB 512GB 1TB 2TB 2.5" SATA 3 6GB/s Internal SSD PC/MAC Lot
$13.99
Samsung - Geek Squad Certified Refurbished 870 EVO 1TB SATA Solid State Drive
$67.99
1TB/2TB Lenovo USB Flash Drive Metal Memory Stick Pen Thumb Disk Storage
$34.90
Toshiba DT01ABA100V 3.5" SATA Internal Hard Drive 1TB Tested/Wiped
$15.00