For those who collect digitally and are fans of Jessica Jones -- Comixology is currently having a sale for the entire original 'Alias' series here.
A few notes:
1. Unlike most Marvel comics this is only available on Comixology proper due to the Explicit Content rating. You won't be able to read it on your Marvel app if you use that.
2. It's actually cheaper to buy the complete series in digital trades over the individual issues. The four trades together will set you back about $20 as opposed to $28 if you purchase all of the issues individually.