www.15KGOLD.COM is a site that at first glance appears to be legit. They provide "feedback of customers" with positive comments. I paid them 50 euros to trade adena in Lineage 2 in a mid-rate server, which is in the list of the servers they are "providing services" to. It turned out that they are scammers. They kept me waiting, for 24hours telling me any moment we will notify you, when the adena is available to trade with you. I waited 1 day, so the day after i messaged them and all they kept sendng me was some "automated" messages, saying that they are afk.
Below i provide Their PayPal account. I hope you find this helpful, to protect yourselves against this scam site. They pretend to sell gold not only for Lineage2 but other Major mmorpg games like World of Warcraft, AION, Blade & Soul, and many more. If you want solid proof of their scam nature, feel free to add my skype kostas psycho (derian4real) and ask for the whole conversation screenshots (i could not upload the file, due to size limit)
Scam Site: https://www.15kgold.com/
Scammer's e-mail for PayPal: sovlamathe@gmail.com