. . . . save any of their potatoes to use as seed potatoes?
Wow, this is a hot potato ;)
People get very angry with me for saving potatoes as seed.
I often use supermarket pots. (Organic, obviously)
True Scotch seed is certified as Mosaic Virus-free.
If you save and re-use pots they eventually get the virus (from aphids and such)
but it can take several years.
I reckon that supermarket pots were grown from virus-free stock
so mine are only 1 year down the line.
Or perhaps I'm just cheapskate.