Hi Glenn,
I spend quite a bit of time in Abu Dhabi ,and visit Dubai too. Back in March I was looking at getting a 40D. Having looked around as much as I could, I found that the price in England was £499 (£599 - £100 cash back at the time) compared to 5000 dhs in Dubai (£750 at Jumbo Electronics). I checked out all the major retail outlets and was surprised to find the products there at a similar price to the UK if not dearer.
I bought a sigma lens from Abu Dhabi as I was able to get a good discount, so paid £200 for a 20-70 F2.8 which was a good price, but the lens has front focusing issues. Fortunately I'm able to get it back there to have it looked into, but despite this it proved a long drawn out process. Unless you can find something on sale, I generally found electronics to be more expensive than in the UK. Even on sale sometimes it's still cheaper in the UK.
Another example was the price of CF cards. For a sandisk extreme III 4gb you'll pay £16.99 here. The manager of the shop said that's cheaper than he buys them for his own stock.
Prices in the UAE have risen alot because of the huge increases in rents, upward of 300% in some cases, so the prices of goods has gone up as well. Where as you could haggle a few years ago; now the prices are set and no one is willing to budge on price. If you've been a regular buyer for years at a shop and are on good terms, sometimes things are different and you'll get a discount.
I haven't tried sourcing electronic items from the souk in Dubai, and am not sure if they'll have DSLRs or lenses, so I can't say what the prices there will be like.
Look on
www.camerapricebuster.co.uk to get an idea of the price of the lens here and compare it to buying overseas. Unless you're making a significant saving, I wouldn't get a lens or any electronic equipment in the UAE, unless of course you could test it before you bought it. You'll have no-end of hassles if it happens to have calibaration issues or something else wrong. If you want the cheapest, you're probably better off sourcing from ebay, hong kong. I'd look into Kerso, who, from what I've read, is a good seller and offers a UK warranty.
In my short experience with this kind of kit, unless I'm able to test a lens/body I won't buy it overseas because a faulty lens will be a bugger to sort out, esp since the consumer laws there aren't very consumer friendly; it's just not worth the hassle unless you live there.
The Saudi prices seem very good, but I can assure you that the UAE is a different matter at least Dubai and Abu Dhabi. as I can't speak for Sharja or the other emirates. Forget about Bahrain too, they were always expensive.
Chris