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There you go
anything under £263.37 is in your budget as £263.37 = $450 that may give you an indication of what may be available for you.
There's not a great deal tbh but it does depend on what you are wanting to do with it. (Gaming, Graphics, Development, Video Rendering, Photo Editing, Music Production you get the idea)
Just have a think about what is important and go from there.