Basically you send them WMZ and they send you WU, or vice-versa. - exchanging
But some are more anonymous than others.
Gaxee.com is totally anonymous, but his fees are a bit higher than others. However, if you talk with him on MSN you can get the fees a lot lower if it's big amounts.
buywmz is the best at the moment, you can buy with liqpay or use a credit card and have it delivered by pin or sent to your account within a few hours.
buywmz is the best at the moment, you can buy with liqpay or use a credit card and have it delivered by pin or sent to your account within a few hours.