All Osiris ambrosias are priced the same way. Pick any one line from the following list:
My intent with this list is that everyone can find at least one item that would be no problem to supply. If none of the above seems like a small amount to you, for example because you're just starting out or you're non-industrial like I am, then I'll probably offer an ambrosia for free. Chat me and ask. Or look up other suppliers.
I balanced the amounts in the list so that I'm about equally happy with any of them, so if you can do more than one then pick whichever one you like best.
I'm most often in Lower Nubia, but I wander around a lot so there is a good chance that I can meet you for the exchange at a convenient chariot stop. If that doesn't work, especially if the festival is near, then we can use trade chests instead. Remember that I'll often have to make the ambrosia first -- this takes at least 1.5 hours and sometimes a whole day, depending on my schedule.
I give a 20% discount for orders of more than one ambrosia at a time. This might be because you want a spare (in case something goes wrong at the festival), or because you're collecting requirements for several people. I like to encourage that sort of thing, and supplying several at once is easier than supplying them separately.
The list below is all the ambrosias that I'm sure I can make. If you need something that's not on the list but fairly close, then I might be able to find a recipe for it if you ask. No guarantees though.
Ambrosias for Hathor have more expensive ingredients than for Osiris, but they're easier to make, so I'll charge the same prices.