First of all, I'd be curious to hear your opinions on Carreras and Autavias.
Secondly, I think it's worth drawing the line between what many Heuer collectors would acknowledge as a "Poor Man's _____" and what eBay sellers market their watch as. This is mainly for posterity / anyone who comes across this thread and is drawn to the idea of buying one.
Take for example this Benrus (
http://www.onthedash.com/chronograph/poor-mans-autavia-benrus-73463/). It is, quite literally, an Autavia that was re-branded and used all original Heuer parts and designs. The case, movement, and even dial/hands/bezel are identical to the original Autavias that were being sold simultaneously. This fits the "Poor Man's Autavia" label correctly, and while it's more expensive than the watch that kicked off this thread, it's still a hefty discount to the actual Autavia it so closely resembles.
Now we shift to the OP's watch in question, which has been labeled a "Poor Man's Autavia" incorrectly. In reality, and as the OP pointed out mid-post, it is essentially a Nivada Grenchen / Croton (see below). Notice the same bezel, the tachymetre scale is the same, as is the general design of the hands. Just because a watch has an inverse panda dial and three registers, it does not make it a Rindt Autavia, and in this case, the price being asked for the watch on eBay is essentially at parity with a decent example of the Nivada Grenchen / Croton chronographs.
And just so the differences are crystal clear, here is an actual "Rindt" Autavia - ostensibly what the watch on eBay has been called a "Poor Man's" version of, despite sharing no similar parts and differing in many design areas.
Click to expand...