Is it possible to buy a decent tube amplifier in the $2000-3000 range?

Check out Quicksilver!
http://quicksilveraudio.com/products/midi-mono/

I say checkout the Rogue Cronus Magnum 2.  Nice integrated that looks as good as it sounds. 

Rogue Cronus Magnum II if you want integrated, otherwise look for a Stereo 100 if you just want power.

Offer 3k for this:
http://www.usaudiomart.com/details/649194389-dialogue-premium-hp-integrated-amplifier/
this has been listed for awhile.

Theres plenty of positive reviews. The Rogue is good also, but I've seen a few listings used that is the result of going with the PL HP after comparing the two.
Subjective, naturally...YMMV.Rogue made in the USA, blah,blah blah.

If it has to be made in the USA-I'd consider the Rogue and Quicksilver suggestions.