I want to go to the yard sale, I heard there are some great deals.
Which of the following makes this sentence correct?
I want to go to the yard sale but; I heard there are some great deals.
I want to go to the yard sale I heard there are some great deals.
I want to go to the yard sale; I heard there are some great deals.
I want to go to the yard sale and I heard there are some great deals.