Yes, I know, this can come off as "rompepalle" especially if asked more than once, but you have to understand the other side a bit, different volumes can incurr different cost models, but yeah they should have free tiers and sme sort tiered pricing.
Usually, if they ask budget and call you, or nudge you by a call, run away as fast as you can, it is very liekly a scam.
Overall, I agree with you these are not good salesman, if someone cannot deliver a good sales pitch, like listening to the potential customer, they do not deserve you business.
A sales or leads pitch goes like, establish the need, timeline, pain points and as very last the budget. IF they are too dumb to read a business book or a 30 minute video online, f them is what I do.