there is many ways such as forum advertisement by auction dont kNow where section it can be found but you can try that.
It can be found on the Auction section and this is the latest round:
Advertise on this forum - R'
This is the best way to adevertise in this forum but its not that cheap , however many member here can notice your exchange having that ads and thats not bad exchange for the money you will use.
not only that, there are also many other option that can be use.
But i agree this one is most use but it costly unless the owner have enough budget for that advertisement . Since its auction you need to always watch that thread and increase your bid if needed.