The coasters are extremely desirable and the art work by Lou Skuce is truly awesome.
Although the set is numbered to 20, four of the coasters haven't yet been found, and those are 19 and 20 being Conn Smythe and Dick Irvin, the other two numbers missing are 13 and 15, leaving out Ken Doraty and Bill Thom.
Within the Maple Leaf programs you can clearly see Smythe, Irvin and Doraty coasters had been drawn but Thom was a called up late from the minors later (Dec 28 1932) subsequently his coasters wasn't drawn as most were.
One interesting part of the advertisement is that Smythe, Irvin, Doraty and Thoms are not mentioned in the kids blurbs, however all the other players are mentioned.
Because these coasters were issued with soft drinks, making them children based and being regional to probably Ontario, not to mention they are coasters and were used (well maybe some kids used them) would make for a very tough survival rate.
Pricing vs condition apply to these, although tough to find in any condition, Donald is correct at atleast $1000 for one can be a safe assumption as they are not regularly offered enough to gear consistant pricing.