I'm offering a 160x160 banner advertising on my 10-month gaming forum: play-connect.com. Ad will be displayed in the right sponsors tab which is available on every single page of the site. Price is $15 month and here are the statistics for the past 1 month: That's approx. 300 daily visitors or over. Also at least 200 of those visitors daily are from organic google search. Reply or PM me if you're interested I'm willing to offer discounts for long-term advertisements.
Here's another analytic stats that includes statistics for our website since its beginning, September 10, 2011. As you can see, we've been growing pretty fast and I'm sure it'll continue to grow over the coming months.
$15 per month for a 125x125 banner is too much for the traffic you have.. But I would pay $15 for two months for a 460x60 banner. And would pay $10 for one month, for a 728x90 banner or even a 300x250 banner.
My mistake it's not 125x125 but 160x160. Also I may be able to accept any ads with 160 width but it just has to fit in our affiliate bar. However $10/month is the minimum i'd accept for any ad as that's what all our sponsors have been paying so far.