If you go to Flippa you get just Flippa's selection of sites. Same with bizbuysell.com, businessesforsale.com or broker sites such as flippingenterprises.com, latonas.com etc.

Wouldn't it make sense to have a location that calls listings from all these sites and organises them in a single location that allows a better search facility across multiple marketplaces, the ability to compare listings and, more than anything, a big time saving for site buyers?

In the past there have been websites that attempted this. Many of you may not know about itsect.com. It was owned by an EP member and later sold to another EP member, but has since gone dead. Unfortunately, archive.org doesn't have a snapshot from when it was operational. When it was running, it did a pretty good job of pulling listings from all the main sources.

Then there is http://bizmp.com/ - an automated site that scrapes listings from forums and dumps them in a list. It used to aggregate listings from various forums including DigitalPoint, NamePros, DNForum etc., but it seems to have been blocked from all of them with the exception of the V7n.com forum. Now the only listings on bizmp are from v7n.

And that's it to my knowledge. They all closed or ceased being developed because the owners couldn't make the ventures profitable.

Putting aside the profit issue, what would an aggregation service need to provide to buyers to make it really useful? And how best could it be done?