How to post on Wanted section


Hello
I just bought a Marsh 400s amp and looking for a Marsh preamp. How do I post one wanted section?

Also anyone has some feedback of using other (good used budget) preamp with Marsh SS amp? I amĀ 
planning to temporarily use Marantz AV 7008 as a processor until I find the Marsh p2000b.

Thanks

dhlesg