I have experience in steam and steam trading, I also play counter-strike so I know how it all works, I have owned a csgo gambling site in the past and I still have the scripts with a fully functional chat, 2 bots and login through steam button with a profile page where the user can give their trade url so the bot can accept requests, this is all achieved though Steam API, Nodejs, Cakephp and lots of other programming languages. I will simply upload the scripts to your sever and change want you want to change. Message me so when can discus this please.
Thanks Caleb :)