Buying a 2009 iMac as a secondary monitor

I’m looking to buy a 2009 iMac to use solely as a secondary monitor for my MacBook. Here is the information the seller gave me. Is it worth $50? Thanks!!

I’m looking to buy a 2009 iMac to use solely as a secondary monitor for my MacBook. Here is the information the seller gave me. Is it worth $50? Thanks!!