Flash is a multi-media quasi industry standard for delivering animation, video and effects to websites. In fact many websites are built entirely in Flash. I am not a great fan of this technology. Whilst it can look great, it can take an enormous amount of time to load for a visitor and there is a temptation to “over do” it. Equally Flash (and the Microsoft equivalent Silverlight) can be hugely complex and time consuming from a development perspective. Having said that, it is quite often useful to use in building more dynamic elements for the website, such as animated banners and such. Again, I can deliver Flash (but not Silverlight), but we would need to discuss the scale of usage before I could confidently quote prices.
Typically a Flash advert type banner will cost €75.