hmm i can write a scipt 100 times better and you asking 0.25 btc for it ? jesus i should start writing right away !!!
this script is worth maby 10 - 15 dollars m8
The script is worth whatever the person believes it to be. As of now he doesn't have much competition, and the script is functioning and in working condition (so I assume) so he has the right to charge whatever he wants for it. It's demand. If he asks too much he will get less sales, but higher profit for each sale. If he sells too low, he gets more customers but at a low rate with little profit.
10-15 is too low. Try selling this script for 10-15 per person on BitcoinTalk. You might get 10 customers at first...
$125... Was it worth the time you spent, but time you will have to be updating/providing warranted support; better cut out on something.
By all means, make something better if you can. Don't bash a script because of a pricing scheme which is fair at the point in time due to a only-reasonable demand.