I'm looking for a manga where one of the main characters is a prostitute. Someone who sells sex for cash. Either on the street or in a club like an escort or something. The more central the character is the better, I'd prefer it was the main character like in Sakuran, but a support character like the bassist for blast in the series Nana. Or the brother in Desire climax.

The longer the series the better. The prostitute can be Male or female.

Feed your head.

deep love - ayu no monogatari and its sequels and stuff

[img]http://img.userbars.pl/69/13603.gif[/img]

I came across those before, but I'm not really into tragedies..

Feed your head.

How about BODY, not excatly the whole body but he is a host.
Antique Romance
Shinshi Doumei Cross (not the main character, her friend, Usui did. Though not for money.
Oedo wa Nemuranai! She didnt sell her body but she is an oiran alright.

Uhm ... dat all I can remember right now. Not sureif it would help much. >.<

The girlfriend of Eden's protagonist is a prostitute, although this is probably not the manga you are looking for.

[img]http://img716.imageshack.us/img716/6818/29042893.png[/img]
[img]http://img.userbars.pl/69/13603.gif[/img]

Try knocking yourself out with these: http://www.mangaupdates.com/series.html?search=prostitute&orderby=rating

[url=http:////www.mangaupdates.com/showtopic.php?tid=42718][img]http://i366.photobucket.com/albums/oo105/CatzCradle64/Avis-Sigs/FunghiPower_zps2a00ba56copy_zpsfc03990e.png[/img][/url]

Desire Climax, the heroine's little brother (though not through blood) works as one, but it isn't part of the main plot.