I've never heard of a Dale Earnhardt package available from the factory, but many of those packages were dealer installed down south.
Nothing, dead people can not make money.
Depending on the make, model and condition of the machine, ie; Dixie -Narco, Royal, with the Dale Earnhardt insert, the machine is worth $1500 to $2500.
Click on the link below for more Dale Jr. diecast information
In 2011, in a 36 race schedule, icluding bonuses, Dale Jr. earned $5,329,888.
In 2008, including bonuses, Dale Jr. earned $5,449,861 in a 36 race schedule.
In 2010, in a 36 race schedule, including bonuses, Dale Jr. earned $4,940,288.
In 2012, including bonuses, Dale Jr. earned $5,816,567 in the Nascar Sprint Cup Series.
Excluding bonuses, Dale Jr. earned $1,506,363for winning the 2014 Daytona 500.
Dale Earnhardt, Jr. won both races. The first race was a 5 lap race in which Shaquille O'Neal had a 1 lap head start. The second race was a 10 lap race in which both racers started evenly, but Dale Jr. had to make two 4-tire pit stops. Both races were won by a last lap pass by Dale Earnhardt, Jr.
For his win at Michigan International Speedway on June 17, 2012, Dale Jr. earned $168,775.