How do I buy Illinois RV and get it to New York?

IL does issue a temporary tag. We were in the process of purchasing one in that state and long story, but after having an agreed upon price, owners tried to get us into a bidding war with another couple who showed up and wanted it, so we walked away. We had researched and next step would have been to take newly signed title to DMV with our drivers licenses from our home state and purchase the temporary tags to get it home where we could properly title and register and plate it.