You dont need to trust the site, but the people behind it.
Im the owner of BucksMania.com as well so this should good enough guarantee, not to mention the people who know me and have used my services even before the official site was launched. On request i can provide quite a few references as well
money laundering is not the exact term here, because its perfecly legall for amounts under $10k
edit: ah and 10% is pretty much the standart fee
also for bigger amounts there may be discount...