Thats the scanner assembly me thinks.
http://www.fixyourownprinter.com/printer/10/9504.html
http://www2.printerworks.com/cgi-win...d?RG5-0449-000
This is the diagram for that part.
http://www.printerworks.com/Catalogs...perPickUp.html
It's a toss up...
upto $200 brand new if you can find one
and you can get a used one on ebay for like $125 shipped..
If it were me i'd look into fixing it especially if you have extra cartridges laying around. just my 2 cents