looking through tesco toys and they have a few sylvanian families sets in there, this one comes with the nursery and the bus (around £17 each seperately) for £24.99 and is also on 3 for 2 - there's a few sets there on 3 for 2,

to get the most out of the 3 for 2 i would recommend (when buying more that three) doing different transactions

ie if you have 3 things for around 25 each and 3 things for a tenner each
do the 3 £25 ones in one transaction to get one of those free then the three tenner ones to get a tenner free (saving 35 instead of one big transaction where you get two tenner things free)

link for all the sylvanian on the 3 for 2 http://www.tesco.com/direct/brands/all-sylvanian-families-toys/cat43610026.cat?pageViewType=grid&sortBy=3&catId=4294699476+4294959246&lastFilter=Sold+By|Tesco