Ken:
Who really cares what the flavorizer bars are made out of as long as they are functional. They are dirt cheap to replace (once they have holes) and never look great anyways. Viewing the entire grill with the additional photos you posted, if you want the convenience of a sideburner, and it is truly a NG grill than you might consider going up to $120 since a NG grill with the sideburner wasn't all that common. Plenty in the LP models which had even bigger rust issues. For that price the igniter, burners should work and be intact. Also know that those are cast iron grates, not stainless steel. I use my sideburner about twice a month since it keeps the house cooler if everything cooking is outside. Also, these were the last of the E-W burner configuration you can use a rotisserie with effectively. Again, if you feel comfortable reach out to him after it has been posted for awhile. Just know, that conversion from NG to LP isn't easy other than swapping out the manifold. Ask LMichaels and Bruce about that and how it rapidly spirals into a money pit.