I bought a new copy of H:Wo3039 several months back from amazon for $30.
Then I went to GenCon a few weeks ago, and at one booth I saw that book, Historical: Brush Fires, all of the Field Manuals (except the two Clan ones), the Fanpro House Handbooks (Steiner, Marik, Davion), and a ton of other FASA/Fanpro books all for $5 apiece.
My wallet wept, because I had dropped $30-35 apiece for each of those books less than a year ago to round out the holes in my collection.
At least I was able to buy a $5 copy of HB:HS to replace the $35 one that had a bad binding that started falling apart before I was even 50 pages into the book (and I'm very nice to paperback books...)
If you really want a DTF copy of an out-of-print BT book, unless it's something obscure or hard to find—like the Clan Field Manuals, The Clans: Warriors of Kerensky, the merc supplements, etc.—you shouldn't have too much trouble.