Evaluating Market Pricing

[Kellis Landrum]

Hey Gang,

I joined bigger pockets a few months ago and have been reading up on a lot of great info. 

I am looking to buy in Memphis (38115) from a turn key provider. I have found a few forum threads where people who have bought TK rentals have found when the go to sell them that the house is not worth what they paid for it-

http://bit.ly/1R68VZp

http://bit.ly/1MqwcWK

I would like to avoid this if possible and wanted to get advice on how to properly determine the market value of the property. If there's anything I've picked up from BP, it's that "buying right" is a critical part of investing successfully. My financing requires a 3rd party appraisal. Are there any further steps beyond this I could or should to take to get an accurate idea of the properties true market value?