ah ****s sake. this is true. "oh my god art actually costs mONEY??!?!?!?! WHAT IS THIS"
11 characters IS A LOT. sig art is not necessarily "smaller" -- its resized so it looks smaller. usually, its drawn at a higher resolution. i have paid 80$ for two characters multiple times -- because, this may come as a surprise to you guys, but artists need to make a living and if they can sell it for that much, you can be damned sure they will. people underprice and undercharge so much that they hurt themselves and the attitude that $80 is "too much" for 11 characters is so bad.
yes, art is subjective. what you find to be worth 80$ is different than what i find to be worth it. but when you have the money to spend and find an artist you really like, youre going to spend it. sure you might wish its cheaper, but you have to again, understand that this artist is working for pennies because its SO HARD to get an audience and to keep that audience, which is why people underprice. many freelance artists work for below minimum wage. below. minimum. wage. to get a grasp on their audience.
undervaluing art is really awful and needs to stop.
(hope you get your payment sorted out, others have given advice on that~)