Won't print (by 3 users)

I have a Lexmark73 printer/scanner/fax and it will no longer print. When I try it sounds like it's slipping gears and the paper starts to feed but will not go all the way down. I have tried 1 piece at a time as well as a stack of paper to no avail. I'm guessing the rollers or wheels or whatever that pull the paper down to the printing heads have worn out and I will probably need a new printer It's about 5 years old. Thank you, Mark