Donkey Kong Jr worth

Based on the catalog results you have, the value of "Donkey Kong Jr" varies significantly depending on the platform and condition. The original Donkey Kong Jr — Atari 5200 is valued at $1757.8 used [1], while the Donkey Kong Jr — NES version is valued at $388 used [2]. If you are looking at the NES version, the Donkey Kong Jr Math variant commands a much higher price at $2999 used [4], compared to the standard NES version [2]. For a very low-cost option, the Donkey Kong Jr E-Reader for Game Boy Advance is listed at $14.45 used [5].