They are basically base Omegas with xenons and heavy duty springs, cloth interiors and manual rear windows. Facelift cars only had climate control because it was standard on all facelift Omegas.
They were available across Europe and with 3.0/3.2 V6 petrol and 2.5 DTi diesels (not UK) and manual or auto regardless of engine.
In 2003, a 3.2 V6 Special Estate cost £18,300.
They made very good blank canvases for projects and most of the niceties of the Elite could be retrofitted as the wiring was mostly already fitted from the factory.
Value will be on condition, and what's fitted as most worth buying are preserved plod rather than day to day cars. There are exceptions to this, but expect to pay premiums for these.
When they were readily available, if you knew what you were looking for, they were very good value. But late Omegas were still available via Network Q for several thousand.