6-9 digit .xyz domains are just 0.99$ but all the cool numbers are already taken 
696969.xyz - taken
420420.xyz - taken
13371337.xyz - taken
655360.xyz (640KiB is enough for anyone) - taken
100003.xyz (smallest 6-digit prime) - taken
121393.xyz (fibonacci number) - taken
01000101.xyz and 1000101.xyz (69 in binary) - taken
@hideki Does that number have any meaning? Also it's 1 digit too short to be 99 cents.