The Playmobil advent calendars are on sale at TRU for $19. They are normally around $45 at Xmas. There are ones that aren't holiday themed. I got h the rescue calendar yesterday and it has entertained him literally ALL day yesterday and today it's again the only thing he wants to play with.
There are also two large kits on sale (about 40% off) if you're looking for bday sales. One is a school house that looks amazing and the other is the Knights set.