What an odd list of failures where the top one probably sold more than the rest combined.
hmmm the Commodore 128 was kinda huge back in the days. A lot of people who had C64 bought the C128 only to realize they had to use it in C64 mode to play their games but still... The C128 sold quite well.
According to Wikipedia the Commodore 128 alone saw about 4 million sales... Granted it's only a third to one fourth of the C64 sales, C64 which is considered to be the best selling personal computers of all times but still...
Still according to Wikipedia, the IBM PS/2 was largely unsuccessful with the consumer market (with "only" 2 millions sales during the entire life of the PS/2 line).
So I'm really not sure the top one sold more than the rest combined : )