I've never been a vendor at the shows , but I've attended quite a few. I always offer lower than the asking price on animals that are several hundred or more $, but never offer a discount of more than 20% off or ask for a discount on low priced animals. The 20% off offers are sometimes accepted and sometimes not. Sometimes you'll get a counter offer and sometimes the price is firm. I've never had the sense that a vendor was offended. as others have stated, it's expected. Don't push it if the vendor is unwilling. Generally show prices are not out of line with online breeder direct prices. I also ask for discounts there. If the price is firm, then it's up to you to choose. I've paid full asking price for animals that were non negotiable plenty of times. And I've gotten the 20% discount plenty of times. After a few transactions with one of the very large breeders online, he replied that he would open a wholesale account for me (always 20% off) so I wouldn't have to ask anymore!