to start off with what model is it that your looking @usually dynamic are either the 1.8 petrol or 1.9 diesel? 3door or 5door?
But i though they stopped the dynamic model range in 2003-early 2004 as the 1.8 varient went from dynamic to sporting then!
Most problems on the stilo were ironed on the 2003 onwards so you have nothing to worry about?
Check the tyre wear and condition, is there much tread left? Most importantly is the tread pattern on the tyres evenly wearin, no bold inner edges, etc...
When is the next service due? If soon try and get that thrown in?
Check out prices on parker car guide???