Here we have a list of the Valiant models listed in order of how long they were in production for.
In production for approximately 33 months
In production for approximately 29 months
In production for approximately 24 months
On sale for about 22 months
On sale for approximately 21 months
On sale for about 18 months
On sale for about 17 months
In production for about 14 months
On sale for about 14 months
On sale for about 12 months
In production for approximately 12 months
On sale for about 11 months
On sale for about 10 weeks