Thanks Bruce88123 for the advice, I plan to find locally somebody with a buddy box for my initial flights. It was a business trip with a very tight program and it is a miracle I even had the chance to "still" half an hour for model shopping. I went to Phil's hobby shop in St. Petersburg who was very helpful. It was my first ever trip to US and everything is quite different than in Europe, especially transportation. If you have not a car you can't really do much of anything. I payed 70 dollars in Taxi for my "shopping" and another 110 dollars for "excess baggage"[:@] to Delta Airlines on which the youngest air hostess could be my grandmother! Anyway I didn't regret it at all.
Manos