Yes it is true, but only if I buy 50 of them!
So if you would like to buy 5 for a tenner and if I receive confirmed orders from at least 8 of you I will be happy to order them and either deliver them to you at Horton Country Park on a Saturday morning or I could bring them to the dinner dance at the end of Feb or you could collect them from me in Epsom.
There are of course other sizes available (700 x 28-38, 27 x 1-1.25, 26 x 2.3-3.0 etc) so do let me know and if there is sufficient interest I will order those as well. Oh, and they are made by Specialized - high quality, light weight, black rubber....ooooo!
Here's the cheapest source that I have found so far and this shows the details of the tubes available. Do let me know if you have found a cheaper supplier and I will be happy to buy from there.
ps For those who are new to blogging, just click on "Post a comment" below this note and leave a comment.
Having finally looked at the link you added, Steve, it might be worth considering buying the "long valve" version of the 20-28mm tubes - unless anyone doesn't want them.
The longer valve is not a problem for "flat" rims, but fits better on the newer Mavic rims like the Open Pro where the rim is slightly profiled. I'm not sure the valves are long enough for any of the aero race rims though.