It's still a month away, and the catalogue isn't out yet, but on the Target website you can submit your email to be notified with the catalogue when it is released.
Looks like the sale prices start from July 17th for online purchases.
Catalogue will be made public on July 14th, but those on the early bird mailing list can see it a couple days early.
The catalogue is now viewable. (Transformers are on page 6)
Details posted up by ILikeSoundwave...
RID Mega One Step Bumblebee - $85 save $24
Transformers RID Minicon deployers - $23 save $6
Transformers RID 3 step changers - $28 save $11
Transformers Legends figures (Magnus, Skywarp, Optimus) - $5 (no saving)
Transformers Hero mashers - $15 save $5