To find accounts, browse here:
RS3 Mains and Pures
I advice using/readying the following guide before you make any purchase:
1.)
ALWAYS request a sythe PM before a trade, make sure the PM includes both your Discord Name and UIDs as shown here:
Discord PM Template. Example of a correct PM:
https://i.imgur.com/aRITtNd.png
2.) Familiarise yourself with who you can trust:
Trading 101 - Vouches, donor status and how you can stay safe! - this guide explains how to determine how 'trustworthy' someone is
3.) Learn how to stay safe from Discord scams:
How to Identify & Avoid Being Scammed on Discord [Guide]
4.) If you're still unsure how trustworthy someone is, you can use a middleman from here:
MiddleMan Forums (make sure to still request a PM as mentioned above, because many fake impostor MMs exist).
( can't quote the OP, Gladiator, but copied from a reply on this thread
How do I know if someone is trustworthy? )