That is a very interesting set, but not from the 1930's. The are rather reproductions of 1930's shapes, similar to the Patent Reproduction sets/pieces. It's been up a few time, unsold at $3700 (2x's),$3300 and $3100. Estate Reproductions got for $150 or so. As such, maybe $1800 to $2000 for the set is reasonable,so he's getting closer.
http://www.ebay.com/itm/301862392514?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D301862392514%26_rdc%3D1
That seller has some very interesting pieces. If this was not a 9 mm filter pipe, I'd be interested:
http://www.ebay.com/itm/New-Limited-Edition-Peterson-Patent-Collection-Bent-Smooth-9mm-Estate-Pipe-/301860598876?hash=item46484b345c:g:BIMAAOSwFMZWq~q3