I'll be honest - I'm not very familiar with posting ads on craiglists. But I know very well how to make programs for automation of work in the web, I even did a program for automatic work with online auction (it could relist auctions, make offers and some other functions).
I just need more detailed task. I'll make the program fast, it will be qualitative. If you're interesting in my offer, please, contact me via PM.
P.S.: $130 isn't the lowest price for me
P.P.S.: I'm sorry for my English :-) my programmers skill are much better then my language skills in English