The Rawson 26 is basically a fibreglass round-bilged masthead version T-Bird without many of the Bird's excellent features. I believe they actually have T-Bird keels. I don't think too many were built, and for some reason almost all of the ones I've seen have suffered some neglect. Is the one you are looking at in Squamish by any chance? PM me if so.
Probably getting what you are paying for... (not much). Don't forget that the temptation to go for the "cheap" deal will result in something hard to sell in the future.