I'm considering offering a jars and lids bulk purchase scheme
Hate to rain on your parade ... but, I was involved in a bulk purchase scheme (not beekeeping stuff I would add) ...everyone thought it was a great idea ... loads of advance orders ... great prices (I just passed on the discounts) then.. the stuff arrived ...
People wanted to draw smaller parts of their orders.
Some decided they did not need what they ordered.
Some wanted it hand delivered.
Some had 'no cash in the house' will bring it next week - never did.
Phone calls day and night about quality, price, packaging, breakage, you name it.. . people complained about it.
All this and me doing this on a not for profit basis and footing the bill in advance. I ended up out of pocket, storing stuff I didn't need and a very jaded view of people that I previously thought of as genuine and upstanding ...
Good luck:
My advice:
Payment with order not COD/Delivery.
Set time/date for collection - miss it and the order goes in the skip.
No refunds.
No changes to orders.
Dedicated mobile phone for communication (you can then ignore it).
It sounds harsh but my experience left me feeling Never Again ... and I know a number of other people who have gone down a similar route with identical experiences.
Goodness only knows - any club treasurer will tell you how difficult it is collect subs every year.