Definitely worth paying a visit to John Lewis if you are near one. They do that mini one (£49) I think but also some other inexpensive ones which might meet your needs. The staff are very knowledgeable and helpful. I know someone who has the next machine up from the mini one and she has been back to her local branch a number of times with queries on how to use the machine and they have always helped. Or go for another reconditioned machine. Mine is a 1950s Singer and I absolutely love it.
I am looking for recommendations for a good basic sewing machine that can handle a range of fabric thickness. I do sew but stick to fairly basic projects and my old machine died mid cushion cover ! Very annoying ! It was a reconditioned Brother that was far to fancy for my needs !