Other than asking them flat out "Do you work with investors?"

Their state taxes is flat at 5.1%There are ways to avoid or mitigate the taxes(as suggested by previous responders).You can do a 1031(suggested if you plan to keep on investing) or seller financing(installment sale) if you are no longer interesting in owning the asset but want a nice steady return.

-Take photos of each and every room and additional photos of questionable items (TV is an old TV not a new flat screen, etc.). 

In cases where the price is ridiculous I have flat out asked what calculation they use for pricing.

As a fellow Investor/Agent I use a low cost brokerage, like Equity, where you pay a small flat fee per transaction. 

Figure out how much you want to make per hour and then make it a flat fee.Remember, you can always go down in price, but you cannot go up!

No one has a crystal ball in regards to predicting the value of home prices in the future.Your next property can go up 20%, stay flat or even decrease in value.A lot of BP'ers are speculating we are at or near the top of the real estate market.

I'm hoping to purchase my first rental property this year, I have enough for a down payment on  a 2 flat (FHA loan) plus a couple thousand for reserves, I plan to house hack.I have a W2 job, making 50-60k a year.

It can add up to quite a lot of savings, especially if you find a broker who charges a small flat fee and lets you keep the rest. 

I don’t want to make the decision for you, but if you do decide to sell your property you can look into something called a flat fee listing agent.