I think a fully loaded multiband fresh
boatanchor should sell quite nicely for
$199.95 it if offers compareable features.

Wow, pie-in-the-sky pricing!

My guess is that if you wanted to replicate a mid-60's vintage Swan 350
from scratch (but using actually obtainable final tubes rather than
sweep tubes) you'd be looking at several tens of thousands of dollars
in up-front tooling and it'd cost about $2000 or $2500 for each one you
produce.

They listed for $420 (just for the rig, add on more than a hundred more
for VOX, speaker, power supply) in 1965. They had a good run, and a
decade later were being offered (with some updates) about a decade
later when they stopped selling them because at that price hardly
anyone was buying them. What makes you think that the sheet metal,
transformers, parts, etc. are going to be cheaper today?

Producing it in China might let you sell it at a less-than-$2000 price
point.

If you're looking to do a Collins-class rig, you'll never get the extra
$ for the effort because it's still "not a Collins", and even at
overinflated E-bay prices the Collins rigs will still be cheaper.

Tim.