These links take you directly to the shopping cart, but you can always remove the product(s). (Good luck getting them both in the same cart; I couldn't figure out how, and had to do 2 transactions, but it was worth it, as I like both games.)
Gardenscapes 2 Collectors Edition
Gardenscapes: Mansion Makeover Collectors Edition
Don't know what time zone Playrix is in (they're located in Russia), and the only expiration info the email gives is "this weekend only."
Posting on Sat 17 Aug 2013 at about 2000 Pacific Time USA.