Which Passport?
 

I have American and Argentinian citizenship. I switch to my Argentinian passport in Costa Rica to avoid the trouble of getting visas, being harrased for money, etc. I would like to sell the bike in Argentina and I was wandering which passport should I use to enter the country.

Thank you,
hernan

I had an american friend who entered Argentina with US passport and sold his bike in Argentina without problems leaving country. When I have entered Argentina, the officials have never entered bike in passport.
Good luck