The oven I used was this:

http://www.ecateringonline.co.uk/gas...ice-1871-p.asp

Although I got mine on sale for about £150.00. It's extremely well made, all stainless steel and well insulated. Nice and big too. A lot of money, but my aim was to build a "batch" oven of high standard that could do large or multiple PCBs at one time, rather than a toaster reflow - there are tons of those on the internet, I wanted to do something a little different. For example, something like this:

http://www.blundell.co.uk/product/ha...h-reflow-oven/

will cost you about £3,000 GBP (about $5,000) but mine was a fraction of this. It uses a rear mounted heating element which I removed, but kept the huge fan - I mounted two additional heating elements at the top and bottom

http://shop.electrolux.co.uk/product...eating+Element

which fits perfectly, giving a power about of about 3.3kW (the professional batch oven above is rated at 3.6kW, so not far off)