Thank you for all the great replies everyone. No, I do not plan to get my dog vaccinated again, not ever. He is 7 years old now, and his reaction to the previous shots really scared me. I was mainly just asking for peace of mind, in case I do go somewhere where we may need titer testing proof (in place of proof of vaccinating). I'll admit I am even very nervous about giving him a rabies shot at this point. He is due for rabies, but I'm not quite sure I want to even risk a rabies vaccination. To my knowledge, and as far as the last vet check goes, he does not have MVD.
I don't board him, but I am thinking of perhaps taking him to a groomer (rather than doing it myself), altho I'm not sure of that right now, I may continue to groom him myself.
I would like to get a waiver for the rabies, I've read that the state I live in does allow for that. I may check into that further.
Again, thanks, like was suggested, I guess unless I plan to board him, and I don't, or go out in public a lot (and we don't), there really is not much reason for doing titers at his age now.
I was mainly curious as to how expensive titers were, and if more than one lab in the U.S. offered therm, since I was very skeptical of this new vet telling me that titers were "very expensive" and "only one place" does them here in the U.S., I felt the vet was giving me a line of you-know-what.