Online Aviation Marketplaces

Hello

I am helping a friend sell an airplane and a home in an airpark. I
would like to get suggestions from this group as to good online forums
and marketplaces to post these items.

I've never been in the market for either of these items, so I don't know
much about where to go.

Where do you find the best exposure for the best price?
Do postings to rec.aviation.marketplace actually get read?

Thank you,
DanH

p.s. I am specifically trying to avoid spamming groups. But, I thought
this group would be the place to find the best info, and I hope I worded
it correctly so this discussion is on-topic