Amazon has several anime complete series blu-ray sets on sale today. Shipping is free w/ Amazon Prime or on $25 or more.
Spice & Wolf: Complete Series $19.99
Serial Experiments Lain: Complete Series – Classic $17.99
Elfen Lied: Complete Collection + OVA $18.43
There are other related Slickdeals as well:
21.99
19.49
$21.99