I've bought 2 cheap ones from Amazon (do not know the name brands, just picked the 2 cheapest options in the colors I wanted that used affordable filters). Paid about $20 each and they've been going for over 3 years. I completely take apart and scrubs them every 2 weeks and change the filters once a month. The filter part is the biggest cost. I made sure that the fountains both used a size/shape that I could buy in bulk for $20 a year instead of $8 a month.