I got mine from Ikea and Migros. Most of the ones Ikea sell are from the list of 10 plants that clean the air inside best. This list includes the palms and the ferns varieties that they sell there.

I used to be a plant killer but my Ikea plants are still great after 5 months. I got the palms for 29.95, you water them a little bit (say 0.5 liter) once a week, and once a month you add palm feed to the water. The ferns need about the same, i.e., once a week, but less water since they are much smaller size.

The Ikea palms I mentioned are big, they fill about 1m2. They do well near a window but not in full light, and outside they will burn, so keep them inside. The ferns are nice in the bedroom. Oh, and my Ikea plants seem disease free.