There’s 2 ways to trade on LS, well 3 I guess..
1. Best way to trade with ALL members of LS community - come to a fair deal, place on MP, buy item. - should message each other in game first to make sure both parties are ready to go. - very small chance of your item getting sniped
2. Worst way to trade - not recommended - come to a fair deal, message each other in game, put item up for 1 fg to save from paying market fee, other person buys item. - very high chance of item getting sniped
3. Be a guild hopper - there is a guild vault transfer that guarantees the swapping of gear, only downside is you lose your guild progress each time you change guilds