The $36 calls are as you note either poplar or cedar, mostly poplar. Both box and paddle. They are bare wood (have no finish coat) and and lack the fined sanded finish of the call pictured which has mutliple, more expensive, woods and has weather resistant protective finsh. Hence, the additional $4 cost.
Should someone desire to purchase the $36 call of plain ufinished cedar ot poplar I would be more than happy to make them one.
Here is a very handy and effective device I use to dispense corn with - but it could also be used to dispense any other seed or deer feed.
I had an old feeder that had a failed motor... I made a set of brackets to attach the feeder to the rear of the 4 wheeler - the lower one encircles the feeder and has a forward section with holes drilled in the outer ends of the bracket... these holes align with two 5/16" bolts that drilled into the rack of the 4 wheeler.
The upper bracket is an "L" shaped...