I remember us talking about things being so expensive in the states..
Get this, i just ordered this lovely bustier...
It's got boning and all, and it's $30.14, and that's the largest size, the smallest one (for normal super slim ladies) is $18.83
They have corsets, also leather look ones, not sure about leather, but the leather look one is starting at $43.98
They also have great fabric ones.
These are the Dutch prices, now i don't know if British prices are more expensiv (pound prices are usually very expensive) but it should be the same for all countries.
I checked, on the registratiom form it says USA so you should be able to order there too :)
Pabo UK
Warning, those with kids, it's mail order company with fantastic lingery and night gowns, top clothes are (all real cool and sexy) but has also "adult things".