Being called for job change

[Ledidas]

A couple of days ago, a middle man called and asked me if I would like to apply for another job position in another company with a better salary. Information of bigger $$ makes me sleepless . I just started to join my current company as a web developer and enter the world of dynamic type language 4 months ago. I have joined to fix only a couple of projects. I also think such a duration is still too short for me.

I live in South Africa, so if you understand the business background and living conditions in my country, please advise if I should leave for another company. Thank you a lot.