Does it come with a case and accessories? Bernina presser feet are expensive! Also, I wouldn't buy it sight unseen for that price. You need to sew on it and look at the insides. Don't know about whether the 540's are all metal gears, or like the 830's, have some nylon gears. I had one where the nylon cam stack gear was broken and it cost me about $140 to have it fixed. Someone else will probably know about the gears. Bernina's are awfully good machines when they are working!