well.....10000$!! no, just kidding.
It depends who you're buying it from. I suggest just learn to use the program, but if you're doing it online, then you could use paypal. and people are cheap so they would probably rip you off. you want to do this so you wont make the map, but you will get credit for it right? so you have to contact a good mapmaker and ask him to do it. he will offer a price and you could work things down from there.
you will need to tell him/her:
Wintermaul, Pokemaul, Wildkinmaul, Deathmaul, Harry Potter Maul, The Simpsons Maul, South Park Maul, SSBM Maul, Zelda Maul, Gamesmaul, Musicmaul, Moviemaul, Warcraftmaul, Starcraft maul, and many others...
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.