I'm currently playing the part of the game where Cloud is disguised as a regular foot soldier in Upper Junon. I went to the Weapons Store, a noise was made as I passed the thin blue line, and the guy says what he says at the counter. I go downstairs and then back in to him. This time, however, the sound is different, and the guy's line has a bit of a variance.
So, I reached for the script I have saved on my phone---
this one here---and discovered the weapon seller says something different based on how much Gil you have.
From the site:
Less than 1,000 Gil = I've nothing to sell to you! Come back later!
Between 1,000 and 7,999 = Hey! Yo! You want weapons?
Between 8,000 and 65,535 = Hey! Yo! Our weapons are the best!
65,536 or more = Hey! Yo! Would you like to buy the whole store?
So, I decided to test it out. Here are the sounds you get:
(All the links are to Youtube videos, which begin around the time of the sound)
Less than 1,000 Gil =
Wailing siren (It doesn't stop until you reach the doorway of the seller's store)
Between 1,000 and 7,999 =
Soft elevator jingle
Between 8,000 and 65,535 =
This beep
65,536 or more =
Whoosing and whistling/chirping during the marching segment of Rufus's welcoming ceremony (It acts the same way as the siren sound)
Also, you have to cross the doorway of his shop to change these. For example, I sold everything when I had about 7,900 Gil, and he said the same thing in that value range, even when I had 66,807. Only when I walked past the doorway and back did this change.
I had to sell everything I owned and just about managed 66,807 Gil
Needless to say, I saved before doing this and reset afterwards.