There is, or probably was, an English company called Rapier. I think they mainly did imitations of Record and Marples planes. I believe they're respectable tools. I just looked on That Auction Site, and Rapier tools were getting pretty decent prices, in general.
The Corsair planes I've seen were junk, best sold to someone who needs a small boat anchor. But you should look at the one you've got, in case it was built in a period of higher quality.
Never heard of this "Cheers" brand. Was that a promo tie-in to the TV show? Don't recall much woodworking being discussed in that bar.