First, Welcome back!
Now, as for this 'summer special' Mustang...I know exactly what you're talking about and NO, it's not worth $14k. My 91 coupe stickered for aroud 14,500, so that 92 being a convertible, plus another year of inflation, plus the 'summer special' thing, it probably went for around $16,500, MSRP. With 60,000 on the clock and bone stock, I wouldn't think it's worth nearly $14k. Maybe $8,000, maybe - and that's if it's in really good shape. JMO.
E