According to Jeremiah, this verse shows God asking him to buy a field to show that God would help people return home someday. It's like buying something special that you believe will be used again in the future.
Jeremiah 32:9: And I bought the field of Hanameel my uncle's son, that [was] in Anathoth, and weighed him the money, [even] seventeen shekels of silver. [seventeen...: or, seven shekels and ten pieces of silver]
This verse contradicts Jeremiah 32:9 as it emphasizes that faith without works is dead, implying action is necessary, in contrast to a straightforward transaction described in Jeremiah 32:9.
James 2:17: Even so faith, if it hath not works, is dead, being alone. [alone: Gr. by itself]