how diffuculty it will be to get another loan after selling my '05 for an '06 and now wanting to sell the '06

I got a loan to buy a new car in '05, I traded that car in about a year and on an impluse buy, bought an '06. I don't like the '06 and did all the research to buy the perfect car. Now, I want to trade in the '06 for a new '07. I don't plan on getting a new car after this, so I don't want to lease. I just want to know how diffuculty it will be to get another loan after selling my '05 for an '06 and now wanting to sell the '06 for an '07. I have not missed any payments and have excellent credit, tier 1.