Funny, about i.e. "pushy sales people". Let's see, folks contact them about cables, because they sell cables and might let you try them.
They are in business to provide a product and a service to the general public, and to make a profit doing it, or they would not be able to remain in business any longer.
If you are calling them to simply waste time, or preloaded with a bunch of long-winded questions with no intent to buy anything, yep - best to just move on and let them help other customers who are serious.
I have absolutely no affiliation with The CableCo but can't imagine what its like to be a salesperson trying to help people out who dont want to pay for a little extra for advisory and consulting to get the best value cables for their system. The whole damn thing is a crapshoot anyhow not knowing if any cables will help your system or not. Just have to try it and see what works. And, what TheCableCo is all about.
Option-B is to buy a stack of cables, try them all out, take a big loss reselling later.