Buy.com has the Cavalry SATA 2-Bay USB 2.0 Dock EN-CAHDD2B-ZB for $58 - $20 rebate [Exp 4/22] = $38 with free shipping. This two-bay, hot-swappable USB 2.0 dock is perfect for lumping together your odd-capacity drives into one Spanning device. Supports JBOD and BIG (Spanning) configurations.
Two bad reviews at Newegg on this dock. Both were DOA.
http://www.newegg.com/Product/Product.aspx?Item=N82E16822101130&Tpk=Cavalry%20SATA%202-Bay%20USB%202.0%20Dock
It also looks like rotten tech support with no replies from this company from the Newegg reviews.
good find jim! I do the exact same....researching will almost always save you money.
I have two of these - one connected to my HTPC, the other in my A/V production suite, and both work just fine, and as advertised.
I have two of these as well - one on my Media Center and one on my Home Server. Both work perfectly.