Undercover Tourist Legoland current deal question

[wtrmlnlabs]

Does anyone know how long the prices for this may be good for? I think I saw something somewhere on here but I can't find it again. Currently on UT I can get 2 day passes (get a day free) for Legoland for a total of about $267. We plan to do 2 days there and even if I use coupons for buy an adult get the child free it's more than this. We're not going till December so I don't really want to buy them now but I also don't want to miss out on the deal.

TIA