Don't be an idiot. The bible doesn't condemn contraceptives (none even existed at the time of its writing), that was something the catholic church invented, along with several other inventions (like praying to saints, not being able to talk to God but being forced to go through a priest, the deification of Mary, weird prayer beads etc).
Selling people was done back then since it was a bartering culture. People didn't have money, they sold their belongings, and some people who were evil enough sold unfavourable children, which is something God condemns. If you've read the bible (which you likely haven't and instead have chosen to believe what other people SAY about the people rather than reading and interpreting the King James version yourself), you would know that the laws written for the Jews in the book of Leviticus no longer apply, because those laws were made to keep the Jews in line. They were absolutely crazy, and would worship their own creations (idols) and were living with so much sin that God needed to keep them in line if they were going to ever live a healthy sane life or even do anything productive. Jesus came to this earth not to destroy the law but fulfill the law, meaning He wanted people to start following the law, which very few people were doing.
Selling people was done back then since it was a bartering culture. People didn't have money, they sold their belongings, and some people who were evil enough sold unfavourable children, which is something God condemns. If you've read the bible (which you likely haven't and instead have chosen to believe what other people SAY about the people rather than reading and interpreting the King James version yourself), you would know that the laws written for the Jews in the book of Leviticus no longer apply, because those laws were made to keep the Jews in line. They were absolutely crazy, and would worship their own creations (idols) and were living with so much sin that God needed to keep them in line if they were going to ever live a healthy sane life or even do anything productive. Jesus came to this earth not to destroy the law but fulfill the law, meaning He wanted people to start following the law, which very few people were doing.