Or snag a technoid friend. Buy a whole new system. There are drawbacks to putting a new motherboard in an old system. For one, it may not fit your current case. Cost savings shouldn't be your biggest concern.
Quality is key.
So if you opt for a new system, search for the motherboard of your dreams. Pros and cons in everything we do, from upgrading a motherboard to getting on an airplane. Which reminds me of the husband and wife who were on a flight that was hijacked. Husband was lamenting everything the hijackers had made off with. I've still got my ring with the huge diamond on it.