For some of these you may have to resort to the "ludicrous claim" approach, because people will provide information to correct you when they would never provide it just because you asked - go look at old Usenet discussions if you don't believe me.
When they won't provide price information, act as if they've just told you that it's going to cost more than $100,000 and repeat that to them. If they then say "It's not going to cost that much!" "Oh, you mean you do have some information on how much it costs?" Then work them to more detail from there "Well, is it more than 50,000?"
You may also be running into a situation where the person thinks you want an exact price and doesn't have it, so be sure you tell them you're looking for a ballpark number - or if they've irritated you and you wish to unleash the snark, "Ma'am, I'm trying to find out whether I'm going to be feeding my family on rice and beans for a week, a month, a year, or until we lose the house and my child's getting meals at the women and children homeless shelter while I'm out on my own."
Edit: It doesn't quite have to be as ludicrous as I started - a simple "Oh man, I really can't afford $5,000 for that test right now." can also get the conversation started and information flowing.
When they won't provide price information, act as if they've just told you that it's going to cost more than $100,000 and repeat that to them. If they then say "It's not going to cost that much!" "Oh, you mean you do have some information on how much it costs?" Then work them to more detail from there "Well, is it more than 50,000?"
You may also be running into a situation where the person thinks you want an exact price and doesn't have it, so be sure you tell them you're looking for a ballpark number - or if they've irritated you and you wish to unleash the snark, "Ma'am, I'm trying to find out whether I'm going to be feeding my family on rice and beans for a week, a month, a year, or until we lose the house and my child's getting meals at the women and children homeless shelter while I'm out on my own."
Edit: It doesn't quite have to be as ludicrous as I started - a simple "Oh man, I really can't afford $5,000 for that test right now." can also get the conversation started and information flowing.