If not, you can bet there'll be a big, cheap Region Free set in the UK. May or may not have that extra bonus DVD disc (which, checking the specs, seems pretty lame content-wise), but you can bet it will end up being way less expensive than any counterpart US set, and will use standard keep-cases instead of the crappy book pages/sleeves thing.Back in the day I bought seasons 1-5 on DVD. Never bought any more of them my disc collection has been so-ever-growing since then and certain potential purchases just fell through the cracks. But I may pick this up if the price ever goes down on it enough.
Keeping in mind syndication (sales to local stations) and cable (and network (such as MeTV)) reruns are different things. Some programs (such as All in the Family, Three's Company, Barney Miller, Soap) have different versions on some cable stations (such as TVLand) then the syndication version. Some episodes of some programs (Twilight Zone, Cannon) are not available in syndication but have been shown on cable and broadcast networks.Currently I keep Big Bang Theory reruns playing in the background when I'm at home, before prime time and/or on weekends. (Usually tuned to a basic cable channel).
As to whether I would ever purchase a complete series set like this, is highly dependent on whether I still have any interest in watching The Big Bang Theory when it is no longer common in syndication reruns. I have probabily seen almost every other episode several times already (except for the final season).