I am as suspicious as anyone of other people managing my properties, but there are definitely great managers out there.

Given there a so many listings, I am suspicious / skeptical. 

I have a friend who accepted a suspicious reservation that indeed turned out to be for sex work.

I am very suspicious of these sorts of requests.

And if someone was quoting me some price that is well above market value I'd be instantly suspicious of whats the catch. 

One item to note about that - banks are required to file either a Large Currency Transaction Report (LCTR) or a Suspicious Activity Report (SAR - if it appears you are "structuring" your deposits to avoid an LCTR).

Since the buyers will benefit from a lower purchase price it is very suspicious to have the second appraisal come in so low.

There are so many pitfalls and rules to follow that I'm suspicious are not being met with this arrangement.

Tell them to call the cops and you if they see anything suspicious.

If you feel you are being sold something, you are right to be suspicious.