Recently I contacted someone an asked them how much are you thru a text they told me 250.00 but I told her I saw your price mention in TER for 300.00 tho ? An she just replied I think I'm worth more then 300.00 maybe more lol. The only reason why I asked was just to make sure there's no confusion when I show up but is there a better way to ask about the price for her service without feeling awkward 

If her rate on TER or her website are listed as the same, then assume that is the rate. You are never supposed to ask a ladies rate, as you'll get a response such as you got, a dial tone, or I have even been known to quote a rate $100 more than my posted rate, for the simple fact, that on my website it states to not discuss rates, lol.

The only time it should ever be brought up, if for instance, her rate listed on TER is different than what is listed on her website. The rate on TER is set by the reviewer & she may not be aware of what it states, & until she personally changes it, it may not reflect her current rate. To do this, just send an e-mail, stating that her rate is still the $300/hr that is listed on her website, correct?

Is just to ask:  "Is the rate listed on your site or TER the correct rate?"

This way at least you are not bring up a number, which is spooky to some gals, and for good reason.

but I'd not mention the amount.  Her web site is most likely the best number lacking an ad.  If her ad says ask, you can politely ask but never mention sex acts.  It's for her time only.  
skb

why would you tell her that you saw a higher rate?????  HELLO!!!!!  I would have kept my mouth shut and agreed to the 250.  Now, if you had seen different rates on different sites, that's different, but she TOLD you in a text it was 250.  What were you thinking!!!!!  Do you want to pay more????

I see ads all the time with one rate here and another rate there.  I would contact her thru the lower rate every time, duhhhhh.

Swim

True, I worded it incorrectly.. thank you for the correction