I'm not interested in investing in more mining hardware, so I won't do the trade-in.  They were originally offered for sale on this thread:
https://bitcointalk.org/index.php?topic=187549.0

And the PDF manual can still be found at this page:
https://www.cardreaderfactory.com/download/documentation/lancelot%20user%20manual.pdf

It's about 400 Mh/s for each unit, and I have four of them.

@poochone  If you are interested, I'll sell all four and a power supply for $350 USD, plus shipping.  Or you can make me an offer.  I'll have to check on the cost of shipping and I suppose you'll want to use escrow.  I can also post pictures for you and power them on to show they are in working condition.