Seems like I can get the size I want, with 4 doors, and not get the Tacoma tax. What do I need to worry about?

https://washingtondc.craigslist.org/mld/cto/d/2003-nissan-frontier-4-doors/6269287976.html

https://washingtondc.craigslist.org/doc/cto/d/2002-crew-cab-nissan-frontier/6328938493.html