Be wary of the facebook groups as most folks will have a "pitch" or just see the possibility of a transaction.

Even then, the IRS may scrutinize the transaction if it appears the intent was to immediately convert the property into a personal residence.Additionally, if you eventually sell the property after converting it to a primary residence, you may qualify for partial benefits under the Section 121 exclusion for primary residence gains.

It’s temporarily lost its shine because of the slow down in transactions.

That's likely illegal.

If they want referral, I can give some names, but they can take a look at themselves too.So in reality, buyer agent is doing like transaction coordinator only.

Can someone please explain how transactions are being made?

Some of which may not be the intent and may in fact be illegal. 

Growth is best served TRANSACTING properties to HARVEST appreciation/equitable gains for redeployment of those gains (better know as PYRAMIDING). 

It depends on how the transaction is structured, and the history of the title and timing. 

Flip side is we are transactional so its all write ON's not write offs does not appeal to all investors but those who want a blended portfolio its very appealing.