Vquestor, thanks bro,
Acutally the Gem WK2 just came down in price for $1200, now im consdering the WK2

because its brand new for the same price is th used Roland. BUT, I found a web site last night that is located in germany, And I was shcoked at the prices they have compering to a lot of places. They had the WK2 for $700 which is almost unbeleveble as well as the WK5 for like $300, Maqam.com sells the WK2 for $1200 and WK5 for around $700.
I do agree though that the Roland has better sounds, the 500 Roland sound great to me excpet I hate to buy something used for the same price or more as brand new WK2, But then again now i hear a lot of new arabic style keyboards coming out. But I guess if I wait I will never buy anything. hehe