Hello everyone! This is my first post. I am wondering about this school I have received a contract from them. However this was said during a skype chat,

[4/24/2012 11:14:02 PM] Them: just one problem, the school will help to do the work visa, but it's not free
[4/24/2012 11:14:14 PM] Them: would you accept that?
[4/24/2012 11:14:19 PM] Me: How much is it?
[4/24/2012 11:15:22 PM] Them: about 4000-5000
[4/24/2012 11:15:33 PM] Me: RMB?
[4/24/2012 11:15:38 PM] Them: yes
[4/24/2012 11:15:50 PM] Me: How much is that in USD?
[4/24/2012 11:16:30 PM] Them: 650-700
[4/24/2012 11:17:12 PM] Them: let me tell you why the school wouldn't provide the visa
[4/24/2012 11:19:03 PM] Them: there was a teacher who promised to come to work here, but after the school helped to do the visa and arranged everything, the teacher just disappeared, so the school couldn't risk to do the same thing

This raised a red flag for me. This would be my first ESL job but I am not stupid. Has anyone any experience with this school or a similar problem?