I am a unregister person, may I purchase ready-made good from other State?
Yes you can. Inter state outward supply needs to get registered under GST irrespective of threshhold limit.
Yes you can purchase. interstate supply attracts Gst.. that too if you are registered
Yes but than you need to Registration Mendatory under GST
Yes u can..and no registration will be required since the same will be chargeable under reverse charge and the supplier will have 2 pay the tax.
If you want to make inter state purchase, you need to get GST migration irrespective of Threshold limit