Quoted from Whysnow:LOL
Some games go up in value, while others go down.
Congo is a fun game and relatively limited in production for the era. Many people have realized it is as fun as some of the other more highly priced games, so the market value has responded.
I think we have seen many of these "entry level" games go up in price a bit in the past few years and that trend has held steady.
Look at this sellers previous pins for sale. Sometimes no prices, no pics, and no closure to ANY of the threads. No "sold", "Sale Pending", "keeping game", nothing. I don't think arguing value with him will do anything and will donate a $5 to pinside if he even bumps.