That looks great! Do you remember where it came from? I've found enclosures similar to these when I was looking for one to just buy, also some were fully enclosed with a roof too which was pretty neat, but none were that cheapprehaps I'll have another look
I managed to track it down in my e.mails .. I purchased that one in November 2013 from Real Smart and it was only $27.96 + $10.94 Shipping [$38.90] but I note that particular one is out of stock:
http://buy.realsmart.com.au/search?w=playpen