Have I said Hi and welcome Dazie? If not Hi and Welcome to the forum.
I started off selling cards when I was working in London, I charged £2 and put half to the Tsunami charity fund. I sold quite a few. Those were C6 size, and later I wanted to make bigger and better cards and I charged more depending on amount of work or materials. I put them in bags, put a warning about not giving to small children to play with in the bag etc. When I was no longer going to London someone there sold them for me, I just had to get them there. Trouble is that has passed to someone else now, she keeps saying there aren't many people left to sell to and I have asked for the stock of 50 cards back if that is the case but haven't had them yet.
I have a basket on my desk at work and sell the odd one, but I don't have many there. I have done a few commissions for bigger personalised cards and I charge £5 upwards for them. I keep making big leaving cards for colleagues or special birthdays but I have been doing that for nothing lately. I still put £1 per card to charity so I suppose I could drop the price and not give the donation. I recently sold a couple of cards while on a course and the tutors who bought them suggested I should drop into their office block occasionally as they were sure the ladies would like to buy some cards but I haven't yet.