Shall I buy the website?

[Tomandme]

I have no experience in buying and running online business. Recently I have seen a website ready for sale visa businessforsale.com. The freehold price is high at around 30k, it said it has established for 10 years and currently generating an average income of £6500 monthly. It is a online marketing website that produces business blogs, the customers order posting of their articles and reviews on the blogs and pay money for it. when I check it against freewebsitereport.com, Alexa website rank and etc, I found this website ranks at 3,218,072, 342 daily page views, and estimated AD Revenue at only $30 monthly. The Net worth is around $600 dollars.

My question is, I know serious money making website won't sale, however does this website worth buying? The seller forwarded screenshots of his monthly income to me of the recent few months, the money looks good but I know in this era almost everything can be false. Another thing I concern is, through Alexa I could see since last year the seller made effort to "polish" the website-rank has been grown rapidly. The seller would offer me one-month inspection period for me to try running it myself before making payment. But you never know what happens after the first month right?

I really need some suggestions from experienced seller/buyer of this sector.

Many thanks!