The Wellington Family Diner has opened in Wellington at 315 W. 8th at the America's Best Value Inn.  Bob Master, owner, said that the breakfast buffet will feature scrambled eggs, hasbrowns, ham and all the essential breatfast items one can eat for $5.95.  Lunch will feature roast beef and fried chicken.   Dinner features include K.C. Strip for $8 and catfish on Fridays.  The Diner is open daily with Sunday hours of 6 a.m. to 2 p.m.