In reply to Father Noel Furlong:
I'm not generally a fan of buying second hand footware of any description, but a pair of ski boots with only light use should be fine if you have a good idea of fit. Avoid anything that's already been hot moulded, as mentioned. If I saw a pair in my size in good nick, I'd snap up a pair of Technica Diablo tomorrow
On the other hand, I got my Salomon boots for less than half retail price at a ski wear sale and they hot moulded them there and then for me.
I'd be inclined to stick with renting skis, unless you're really keen - that way, you'll be able to experiment with different/latest styles and it doesn't matter if you trash/lose them. Also saves space storing them for the other 50 weeks of the year and transporting them. Most people I know that ski do this - the exceptions are those of the uphill shuffling persuasion that therefore use specific set-ups.