You aren't getting an answer because you have not given us enough information for an answer.

Some of these flat fee websites are "middle men" that aren't licensed but refer to a local licensee. 

Primary reason being is that once you reach 5-10 large assets (50 units+) or so you aren't investing in RE, you are investing in your business and your business happens to invest in RE.

Second with a duplex, you have two units you can rent out.If you aren't in the area, find a good management team to work with. 

Unfortunately, the prospects of buying it at a discount aren't great. 

If you haven't signed anything yet, then you aren't their agent yet and have no legal responsibilities. 

Account Closed in most jurisdictions the assessments are below actual value, because if they aren't they get every homeowner in the county protesting their assessed value every time which the county doesn't have the resources to properly deal with. 

I talk with families all the time about probate, and they're shocked to hear that there are companies out there that will do all the documentation for them, that aren't attorneys and don't charge high retainers.

FHA loans aren't appealing to sellers.

It's not impossible, but if you aren't getting off-market leads on your own, it would have to come to you from someone.Others will say otherwise, but Facebook ads for distressed seller leads are not great at all.