So, their salesperson was shooting a penalty with no goalkeeper: All they needed to do was send an offer, and we would negotiate and close the deal.
Instead, they called my CTO multiple times, all at awkward times, like during his lunch. When he didn't pick up, they started calling HIS WIFE. The CTO eventually unplugged the vendor, and we had to find an alternative.
Ironically, another competing vendor we contacted did the same: they never stopped calling, they never wanted to schedule a proper meeting by email, and when you picked up, they didn't want you to hang up, even when you were busy.
I don't know how sales in tech can be so bad. Not even car dealers are like that. If I see a form stating, "Contact us for pricing," I am never doing it. I don't want to be grilled for 30 minutes on BDE calls: "Can you even pay us?" and then another hour of death by PowerPoint until they finally give you a price. That is, if they don't spam calls first.