Originally Posted by mpahlca

ultra niche you would have to go to traffic brokers, or sites directly search your market know the top results then approach the owner if they send you to a broker talk to them.

For budget i would base my budget on my ability to throw money away. So if i was willing to spend 1k a month thats what i would spend. I would allocate the dollars across sites though and watch and monitor the traffic in, you would need a good server log software as well as analytics and maybe use real time stats like histats.com if your not great at reading log files.

the best ways to test traffic are to do 7 day buys from a site, then send it to your best converting page so far, you then analyze as the hours go buy what the traffic and conversion behaviour is, each hour you try one change see the affect over the previous hour and then adapt your tour, if your really smart you would break your site down into php elements and analyze the exposure to clicks thru of each element then further evaluate the flow of traffic to the join process.