Where are you seeing these for $20 other then Ebay? I've been looking to find them for CHEAP without much luck. Two companies are selling them on Amazon Marketplace for $28.99, but I don't trust them. The average list price on Amazon is $40. One moron is actually trying to sell them for $80.
I've been wanting to buy the DHP-II for a few months, but I don't want to pay $40 on something I don't want that badly and there is a chance that it could break.
UPDATE: I ended up buying a pair for $30 Today. I don't use or trust Ebay/Paypal, so that wasn't an option. If these don't sound like a $250 headphone i'll be mad! Kidding. I'm hoping at the very least they'll sound as good as my KSC75 or UR-55. I did try the JVX RX900, but hated those. Should have went to the RX700(?) instead. Maybe there is something I can do to keep them from breaking. I guess I need to be extra gentle with them when I put them on my head. If these sound better then the Creative Aurvana Live, then i'll be VERY impressed.
Hey man, for the price I think you will be pleasantly surprised. Just keep in mind that you got them for $30. As far as finding them for ~20 USD... I got it from the seller called "Midwest Wholesale Distributors." He/She/They were selling them for $21 USD, but they increased to $28. Either way, I don't see how anyone wouldn't like these HP's as long as they don't toss em around! The sound is really nice, man!