A 'real' biz tycoon will refuses any offer from Tom which lower than 9!
By pressing the 'none of them' button, and after 2 minutes resting, he will be ready for new errand...
And.. If u have the barn space and extra patient, truck orders usually give better price for jewelries than to sell them full price on stall.
Eg. 3 rings will get 2709 coins.