If I understand the question correctly, there are only 2 options for purchasing fg with $ here.
1. Buy fg directly from the site:
http://forums.d2jsp.org/buyGold.php Those rates do not change.
2. You can donate on the behalf of another user who offers their fg using the donate for me automated tool:
http://forums.d2jsp.org/topic.php?t=71291037&f=34These rates can change depending on who is offering their fg for donations. By clicking the "Recent History" tab you can see a list of the most recent donations and their rates.
Any other method used $ to obtain fg apart from the ones above would be considered an illegal trade.
http://forums.d2jsp.org/info.php?p=9Quote
17. No monetary sales of anything on, from, or through this site, including, but not limited to: accounts, virtual goods, forum gold, CD-keys.
This post was edited by Phyerox on Jun 16 2018 10:31am