Cartridges are in their very nature fragile and the most careful of individuals has a user error within them, as we are fallible.
I not only know the Stories, I know individuals who are the Story, when a £4-5K cart' is exposed to the moment of lack of finesse, the sick feeling goes to the core, and then there is the repair bill to receive as the final bitter pill to swallow.
Encouraging individuals to experience items they may not be used to in any great capacity is not a bad thing, their confidence will grow through the disciplines being learned for the handling and the interaction.
Making an ease of access to extremely expensive fragile items, for those with a wanting skill set and lack of confidence around Cart's, such as the types assumed to be added to a selected itinerary of Cartridges as home trial demo' items.
Where the method to acquire is seemingly using mail order and forum support as the only guidance, might lead to 'ends in tears' stories, if a certain type of user takes a punt on a discounted Cart' as a Trial Period.
Finding an inroad to being able to offer a Cart' at a 'Trade Price' or 'Near As', is looking the safer bet, as the individual can seek out a Cart' that is off interest, get it demoed through a Professional Service, 'if available', and shortlist it for a time when they would like to commit to a purchase.
If when monies are to be spent, and they are still attracted to one of the items in an itinerary available from a Member of this forum, then all well and good, especially if the discounted price is covering a Warranty and Aftersales Support that is matching that from a Dealership. This seems to work, as the Buyer will have confidence in their decision being made, and not feel they are lumbered with something they are not really wanting if an unwanted damage happens.
Plenty of Permutations to be considered when devising such schemes.