I have not found any sold Vintage Whiskered Gentlemans on Outpost for the price of 1.5-1.7 Keys. I do not have a whole lot of proof, but here you go:

http://www.tf2outpost.com/trade/14633666 - 4 Days old @ 1.5 Keys (UNSOLD)

http://www.tf2outpost.com/trade/14288212 - 3 WEEKS OLD @ 1.3 Keys (UNSOLD)

^ That one is the main proof for this new price suggestion.

http://www.tf2outpost.com/trade/14704126 - Selling @ 1.5 Keys

http://www.tf2outpost.com/trade/14452181 - 1.3 - 1.4 Keys, 1 Week Old (UNSOLD)

http://www.tf2outpost.com/trade/14441714 - 1.7 Keys, 1 week old (UNSOLD)

http://www.tf2outpost.com/trade/13262692 - 1.7, 1 MONTH OLD (UNSOLD)

http://www.tf2outpost.com/trade/14719908 - Selling @ 1.5 Keys

http://www.tf2outpost.com/trade/14627438 - Selling @ 1.5 Keys - 1 Week Old (UNSOLD)

All of these are below the 1.7 - 2 Keys and are still unsold

Which is why I am making this suggestion, agree or disagree.

Does not bother me, I would just like to say this.