I'm looking for a 100- 400 zoom.
This site (big City Digital) looks very cheap; does anyone have any experience of them?
I've never come across the company before but just took a quick look and assuming we're taliking about the same company (www.bigcitydigital.co.uk) some of their prices seem extortionate. Canon G9 £429 - available elsewhere at £287. Canon 720 IS £299 - elsewhere £130. Their Canon SLR's are all old models too.
That said, their 100-400 is almost competitive. However, Kerso (a well respecetd member here and on the Canon Digital Photography Forum) has them on a well known auction site for £819 plus £20 p&p).
Second hand might be another option. They sell regularly for around £650 these days.
There's one for sale in the For Sale Forum if you're interested in used equipment.
John