As a reminder for the cunts, the only value that you have is what you can bring on the auction block. So learn to serve your master well, and strive to get the price as high as you can. Compete with your sisters, and be the best slave you can.
"Spare the rod and spoil the slut" is an important tenant for any master to learn. You may wish to care for and protect your property, but that also means keeping her in line. There is nothing safer then an obedient slave.