How much are they asking for the gear? If the 500s is included I would definately consider it. If the 500s is gone and If the price is right you could keep the omega head and sell the bits and pieces of the ilford 500 system and help pay for the enlarger (there is ususally a pretty high demand for Ilford 500 components/parts on the 2nd hand market). One more thing to look for with the ilford 500 is the light mixing boxes - they are often lost (and they are pretty hard to come by)