It is best to have that discussion with a knowlegable representative of the vendor you wish to buy from as they are the authority on such answers, anything we share will be second hand knowledge and subject to error. However, as a geeneral rule most vendors are limited by contract in terms of what discounts, if any, and when they may offer on most power tools. As such the power tool manufacturers largely control any sales, how much that sale is for, and when the sale may happen and most vendors will have specific language on their sales flyers making note of such whenever they have a store-wide sale specifically noting that the sale does not apply to certain brands.
Jet does typically have a once per year sale period, typically 15% off IIRC, but you would have to find out from the store when they have that sale, but it was very likely during the Spring or Summer months, so you could have a lengthy wait until the next sale. It has been a long time since I had to buy a major piece of shop equipment, so I no longer recall exactly when those sales are but the store should know as it is the same time each year. Until then, the store is typically hand tied as to what price it charges you for most power tool purchases.
