I bought an Andrew james one off ebay for about £45.
Its brilliant as far as im concerned, has a timer upto 48 hours and heat settings between 40-70 in 5oC incriments.
It does really well for everything i have used it for.
I also have a crappy vacuum sealer i use for the foods once dehydrated and a few Kilner jars and airtight tuppa-wear type pots for storing the food afterwards, works well for me.