That looks like a great deal. I love Aldi and shop there frequently. I might purchase one of these myself if our store has them.
When I googled gardenline 4 tier greenhouse the following came up as well:
http://www.amazon.com/Gardman-7610-4.../dp/B004T39VWC
Looks like the same one to me. Maybe under a different name/company? If the same then Aldi has a great price. Thanks for bringing this to our attention.