hi guys, please may I know which seller of LYN is reliable to deal with?

Im eye-ing on either Sony Nex F3 or Sony Nex 5n, would probably go for F3 because both of them uses same sensor if I'm not mistaken? O.o
Also, the major difference would be.. 5n is capable of 10fps and F3 is capable of 5.7fps?

Please enlighten me, thanks in advance