older flasher for ice???(pic) value?

oki found this for sale on another site its basically a "original" vex it is in great working order and i only plan on using it for ice fishing. what is it worth approx. and what would be better picking up this or spending a 100 or so on a cheap sonar type device? i really like the accuracy of the flasher though... im torn. also i guess fl-8 parts can be used in this one so parts are available