We got ours at The reject shop, bloody ripper, digital and all. The cheapies do as good a job as the expensive ones.
Matter of a fact we had roast lamb for dinner tonight cooked in ours
Will you be running from an inverter or a generator and if an inverter will it supply enough 240Vac to run one. Specs on the Ebay ones ($49.95) say they consume from 300 to 2000 watts depending on heat setting. We were going to buy one but the power requirements put us off.
Good Luck.