I try to keep my prices the lowest on the market, this means I don't lower my prices unless I need to. (I like to make a profit every now and again as does anyone).
Unfortunately I don't do give backs, I too have made losses through my own mistakes...
I don't donate either - I'm as skint as the next person, hense why I like to spend much of my time looking for bargains on the market.
I sell Ink and Tickets when I get them (Usually sold around the going price.)
I also have a large accumulation of paper that I am more than happy to trade - provided I get at least some gold or an item for it.
I am also willing to accept friend requests - provided I know why you want to be my friend (It's only fair)