He probably also knows the underwriter is going to ask for the explanation at some point anyway and is trying to get everything in order up front.Not sure about your market but in my market most $450k single family houses don't make good rentals, so it would be a little suspicious for someone to do this. 

But even given these facts, not cash-flowing seems very suspicious. 

In addition, it is suspicious and unusual that the seller brought in his own inspector during escrow for a condo unit. 

Nothing about my numbers are suspicious.

Be suspicious of anyone requiring or even asking you to send deposit money directly to them instead of the contractually agreed upon title company.I just declined to offer after doing just a little bit of research on a property and the wholesaler:The property was a Short Sale that showed as 'Under Contract' in MLS.

I would not offer to sign a 2 year lease as many landlord are also suspicious of a offer of that nature.

The IRS is consistently very suspicious of that as a way for you to inappropriately access profit. 1.

It was never communicated to our agent until after the offer was accepted that the tenant is not happy with the new rent price and may move out ASAP.The sellers agent also told us only now that the tenant has been difficult to work with on scheduling showings and now the inspection, even though they already knew that the house was being sold.Then, the sellers agent asked us if we would be interested in using their own property management's service.I don't have any specific questions, but want to get anyone else's take on whether this is a suspicious situation, either with the tenant or with the sellers agent.

Like a previous poster, I (or my property manager) also would want to meet with any applicants interested in my property and we would be very suspicious of any applicant who wants to rent sigh un-seen.

It does sound suspicious.