18 July 2017
No, Unregistered dealer is not required to get himself registered
because reverse charge under section 9(4) [from unregistered dealer] is applicable when registered dealer purchase some goods from unregistered dealer. But if unregistered dealer is purchasing from unregistered dealer then 9(4) is not applicable and hence no requirement of payment of tax under reverse charge and hence not required to get registered under GST
18 July 2017
there is one remote possibility in your query..... read section 24(iii) which says the following categories of persons shall be required to be registered under this Act,–– (iii) persons who are required to pay tax under reverse charge; Just for Brain storming session :.... notification no. 13/2017 dated 28/06/2017 regarding the persons required to pay GST on RCM..... this gives the list of persons availing the various services as mentioned in the said notification...... by virtue of this notification if a person is required to get registered.... then s/he is no more an unregistered dealer and then answer to your query may turn out to be different.... Your views please.
18 July 2017
No you are not required to registered above provision is applicable only in case where a dealer whether registered or unregistered receives any services from Goods transport agency, advocates etc. i.e from persons whose services are notified specifically for reverse charge but if unregistered dealer is purchasing from unregistered dealer then registration is not required.