Then please allow added time for postal delivery to the DMV.
Got that. And what should I consider as a new owner?
You will need proof of the purchase price for sales tax purposes -- have the seller fill out the appropriate NYS vehicle sales tax form, most often the "Affidavit of Sale/Statement of Transaction" DTF-802 available at any motor vehicle office, by request from a DMV Call Center or from the DMV Internet Office.