Just remember many eBay sellers, and CL as well, tend to post high to start. Some actually think they have rare items while some do. Some adds are brought up almost daily in the forums just for laughs. Search "1973 Dodge Charger" in all categories. When the 40K entries show up, on the left side check the "used" box or you'll be wading through new stuff for a year.
There are several B-body web sites out there and also several dedicated to the particular model. Do some Google searching.
Try a search in the for sale forum here, maybe even post them ..................... http://www.forbbodiesonly.com/
I have a '73 Rallye Dash (instrument cluster), wheels, and rocker arm assembly.
Would be nice to know the condition! Rally dash is the most valuable but a lot of times the tach doesn't work. Is the radio area cut up to fit in a modern unit(a lot are). What wheels are they???? Rocker arm is next to worthless unless it's aftermarket. Pics would be nice!