Walmart offers the Nesco Vision 500-watt Food Dehydrator, model no. FD-39P, for $19. Opt for in-store pickup to avoid the $4.97 shipping charge. That's tied with last month's mention, the best now by $17, and the lowest price we've seen. This 500-watt dehydrator features a top-mounted fan and dishwasher-safe trays.