Consider yourself lucky. If you know what your interested in and do your research first, your way ahead of what many salespeople will offer you. Most of them never owned a class A. I take their name and card and ask for some time alone. If I have questions I'll come looking for them.
If they hound us, we usually end up leaving sooner than normal. This is in your favor, if you know what you want, search to see who has it and let them bid against each other. You never have to step a foot into the salesmens office until your ready to buy.