I have a Sony Alpha A230, not the best DSLR by any stretch of the imagination but it suits me fine. The flash is pretty rubbish and as I've got some birthday money I was thinking of buying a flashgun/external flash.
What do I look out for? There are some that cost more than my whole camera!! and some that are about £50.
Ideally I want to spend as little as possible, between £50 and £100. Just something that I can use to illuminate pictures when using auto without washing them out.
What features do I want?