Rummage sale ISO social media page?

Thinking it would be neat to try a group in my area for ISO rummage sale items. Posts would be something like:

ISO NBA BAS-KET game. Budget $30

ISO Century Versys VS.1 bag. Budget $50

ISO solid stainless steel kitchen utensils. under $3.

Then participants in the group would be looking out for those items at sales.

I'd expect about 200 people to participate and around 15 posts a week. I don't think it would be difficult to Ad/mod.

What are random Internet stranger's thoughts on this?