This year I spent 6 Months in Tanzania (Arusha) and after the first day stopped taking my malaria tablets. They are in an excellent condition (we rented a house and they remained in a cubboard all the time - no exposure to sunlite and heat. I've got both, malarone and lariam. I would donate the money to the Shinda Basic School in Arusha where I worked for four months. Make an offer.
By size you probably mean the mg's - which it doesn't say on the packet! However I can give you the following information about them:
Use By Date: 07/2007
Quantity: 3 Boxes with 12 tablets each
As far as the pice is concerned, I thought 60% of the retailprice (which I have to find out) would be OK. Everything goes to charity. I can guarantee you, that the tablets left the room only once when we moved house, otherwise they were stored always in a cubboard with no exposure to heat, dampness or sunlight!!!