In reply to TOm.p:
The organisers normally try to impose a 70% rule i.e. only 30% discounts and only 30% of your stock is allowed to be discounted!
Some companies will break the rules but they will be subtle rather than massive 50% off signs they will just do it but not make a big deal of it! Just check the internet before you go for whatever your looking for and you might get a better deal at the show!
Kind of ruins the idea of it i think but what do i know! The organisers don't want it to turn into a discount market but thats why i thought most people went!