20x Dell Wyse Z10D Dual core 1.65GHz 2GB
http://www.arcy.com/wyz1re2gwt90.html$180/per Free shipping
20x HP T620 4GB, Quad core 1.5GHz
https://www.nautilusnet.com$190/per + $190 s/h
20x HP Elite 8000 Ultra slim Dual 3GHz 4GB
http://www.newegg.com/Product/Product.aspx?Item=9SIA5YV20K0343
$150/per + Free shipping